1 | #!/usr/bin/env python |
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2 | # -*- coding: utf-8 -*- |
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3 | #******************************************************************************* |
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4 | # @Author: Anne Fouilloux (University of Oslo) |
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5 | # |
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6 | # @Date: October 2014 |
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7 | # |
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8 | # @Change History: |
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9 | # |
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10 | # November 2015 - Leopold Haimberger (University of Vienna): |
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11 | # - moved the getEIdata program into a function "get_mars_data" |
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12 | # - moved the AgurmentParser into a seperate function |
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13 | # - adatpted the function for the use in flex_extract |
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14 | # - renamed file to get_mars_data |
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15 | # |
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16 | # February 2018 - Anne Philipp (University of Vienna): |
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17 | # - applied PEP8 style guide |
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18 | # - added structured documentation |
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19 | # - minor changes in programming style for consistence |
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20 | # - added function main and moved function calls vom __main__ there |
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21 | # (necessary for better documentation with docstrings for later |
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22 | # online documentation) |
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23 | # - use of UIFiles class for file selection and deletion |
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24 | # - seperated get_mars_data function into several smaller pieces: |
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25 | # write_reqheader, mk_server, mk_dates, remove_old, do_retrievment |
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26 | # |
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27 | # @License: |
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28 | # (C) Copyright 2014-2019. |
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29 | # Anne Philipp, Leopold Haimberger |
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30 | # |
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31 | # This work is licensed under the Creative Commons Attribution 4.0 |
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32 | # International License. To view a copy of this license, visit |
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33 | # http://creativecommons.org/licenses/by/4.0/ or send a letter to |
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34 | # Creative Commons, PO Box 1866, Mountain View, CA 94042, USA. |
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35 | #******************************************************************************* |
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36 | '''This script extracts MARS data from ECMWF servers. |
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37 | |
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38 | At first, the necessary parameters from command line and CONTROL files are |
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39 | extracted. They define the data set to be extracted from MARS. |
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40 | |
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41 | This file can also be imported as a module and contains the following |
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42 | functions: |
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43 | |
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44 | * main - the main function of the script |
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45 | * get_mars_data - overall control of ECMWF data retrievment |
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46 | * write_reqheader - writes the header into the mars_request file |
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47 | * mk_server - creates the server connection to ECMWF servers |
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48 | * mk_dates - defines the start and end date |
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49 | * remove_old - deletes old retrieved grib files |
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50 | * do_retrievement - creates individual retrievals |
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51 | |
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52 | Type: get_mars_data.py --help |
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53 | to get information about command line parameters. |
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54 | Read the documentation for usage instructions. |
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55 | ''' |
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56 | # ------------------------------------------------------------------------------ |
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57 | # MODULES |
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58 | # ------------------------------------------------------------------------------ |
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59 | import os |
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60 | import sys |
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61 | import inspect |
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62 | from datetime import datetime, timedelta |
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63 | |
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64 | # software specific classes and modules from flex_extract |
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65 | # add path to local main python path for flex_extract to get full access |
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66 | sys.path.append(os.path.dirname(os.path.abspath( |
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67 | inspect.getfile(inspect.currentframe()))) + '/../') |
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68 | import _config |
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69 | from tools import (my_error, normal_exit, get_cmdline_args, |
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70 | read_ecenv, make_dir) |
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71 | from classes.EcFlexpart import EcFlexpart |
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72 | from classes.UioFiles import UioFiles |
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73 | from classes.MarsRetrieval import MarsRetrieval |
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74 | |
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75 | try: |
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76 | ecapi = True |
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77 | import ecmwfapi |
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78 | except ImportError: |
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79 | ecapi = False |
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80 | # ------------------------------------------------------------------------------ |
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81 | # FUNCTION |
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82 | # ------------------------------------------------------------------------------ |
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83 | def main(): |
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84 | '''Controls the program to get data out of mars. |
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85 | |
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86 | This is done if it is called directly from command line. |
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87 | Then it also takes program call arguments and control file input. |
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88 | |
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89 | Parameters |
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90 | ---------- |
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91 | |
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92 | Return |
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93 | ------ |
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94 | |
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95 | ''' |
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96 | |
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97 | args = get_cmdline_args() |
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98 | c = ControlFile(args.controlfile) |
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99 | |
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100 | env_parameter = read_ecenv(_config.PATH_ECMWF_ENV) |
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101 | c.assign_args_to_control(args) |
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102 | c.assign_envs_to_control(env_parameter) |
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103 | c.check_conditions(args.queue) |
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104 | |
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105 | get_mars_data(c) |
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106 | normal_exit(c.mailops, c.queue, 'Done!') |
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107 | |
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108 | return |
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109 | |
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110 | def get_mars_data(c): |
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111 | '''Retrieves the EC data needed for a FLEXPART simulation. |
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112 | |
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113 | Start and end dates for retrieval period is set. Retrievals |
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114 | are divided into smaller periods if necessary and datechunk parameter |
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115 | is set. |
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116 | |
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117 | Parameters |
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118 | ---------- |
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119 | c : ControlFile |
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120 | Contains all the parameters of CONTROL file and |
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121 | command line. |
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122 | |
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123 | Return |
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124 | ------ |
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125 | |
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126 | ''' |
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127 | c.ecapi = ecapi |
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128 | |
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129 | if not os.path.exists(c.inputdir): |
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130 | make_dir(c.inputdir) |
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131 | |
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132 | if c.request == 0: |
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133 | print("Retrieving EC data!") |
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134 | else: |
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135 | if c.request == 1: |
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136 | print("Printing mars requests!") |
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137 | elif c.request == 2: |
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138 | print("Retrieving EC data and printing mars request!") |
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139 | write_reqheader(os.path.join(c.inputdir, _config.FILE_MARS_REQUESTS)) |
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140 | |
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141 | print("start date %s " % (c.start_date)) |
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142 | print("end date %s " % (c.end_date)) |
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143 | |
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144 | server = mk_server(c) |
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145 | |
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146 | # if data are to be retrieved, clean up any old grib files |
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147 | if c.request == 0 or c.request == 2: |
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148 | remove_old('*grb', c.inputdir) |
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149 | |
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150 | # -------------- flux data ------------------------------------------------ |
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151 | start, end, datechunk = mk_dates(c, fluxes=True) |
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152 | do_retrievement(c, server, start, end, datechunk, fluxes=True) |
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153 | |
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154 | # -------------- non flux data -------------------------------------------- |
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155 | start, end, datechunk = mk_dates(c, fluxes=False) |
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156 | do_retrievement(c, server, start, end, datechunk, fluxes=False) |
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157 | |
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158 | return |
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159 | |
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160 | def write_reqheader(marsfile): |
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161 | '''Writes header with column names into mars request file. |
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162 | |
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163 | Parameters |
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164 | ---------- |
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165 | marsfile : str |
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166 | Path to the mars request file. |
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167 | |
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168 | Return |
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169 | ------ |
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170 | |
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171 | ''' |
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172 | MR = MarsRetrieval(None, None) |
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173 | attrs = vars(MR).copy() |
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174 | del attrs['server'] |
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175 | del attrs['public'] |
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176 | with open(marsfile, 'w') as f: |
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177 | f.write('request_number' + ', ') |
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178 | f.write(', '.join(str(key) for key in sorted(attrs.iterkeys()))) |
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179 | f.write('\n') |
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180 | |
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181 | return |
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182 | |
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183 | def mk_server(c): |
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184 | '''Creates server connection if ECMWF WebAPI is available. |
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185 | |
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186 | Parameters |
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187 | ---------- |
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188 | c : ControlFile |
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189 | Contains all the parameters of CONTROL file and |
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190 | command line. |
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191 | |
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192 | Return |
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193 | ------ |
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194 | server : ECMWFDataServer or ECMWFService |
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195 | Connection to ECMWF server via python interface ECMWF WebAPI. |
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196 | |
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197 | ''' |
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198 | if c.ecapi: |
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199 | if c.public: |
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200 | server = ecmwfapi.ECMWFDataServer() |
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201 | else: |
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202 | server = ecmwfapi.ECMWFService("mars") |
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203 | else: |
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204 | server = False |
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205 | |
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206 | print('Using ECMWF WebAPI: ' + str(c.ecapi)) |
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207 | |
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208 | return server |
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209 | |
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210 | |
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211 | def mk_dates(c, fluxes): |
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212 | '''Prepares start and end date depending on flux or non flux data. |
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213 | |
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214 | If forecast for maximum one day (upto 24h) are to be retrieved, then |
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215 | collect accumulation data (flux data) with additional days in the |
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216 | beginning and at the end (used for complete disaggregation of |
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217 | original period) |
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218 | |
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219 | If forecast data longer than 24h are to be retrieved, then |
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220 | collect accumulation data (flux data) with the exact start and end date |
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221 | (disaggregation will be done for the exact time period with |
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222 | boundary conditions) |
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223 | |
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224 | Since for basetime the extraction contains the 12 hours upfront, |
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225 | if basetime is 0, the starting date has to be the day before and |
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226 | |
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227 | Parameters |
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228 | ---------- |
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229 | c : ControlFile |
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230 | Contains all the parameters of CONTROL file and |
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231 | command line. |
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232 | |
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233 | fluxes : boolean, optional |
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234 | Decides if the flux parameter settings are stored or |
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235 | the rest of the parameter list. |
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236 | Default value is False. |
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237 | |
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238 | Return |
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239 | ------ |
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240 | start : datetime |
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241 | The start date of the retrieving data set. |
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242 | |
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243 | end : datetime |
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244 | The end date of the retrieving data set. |
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245 | |
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246 | chunk : datetime |
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247 | Time period in days for one single mars retrieval. |
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248 | |
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249 | ''' |
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250 | start = datetime.strptime(c.start_date, '%Y%m%d') |
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251 | end = datetime.strptime(c.end_date, '%Y%m%d') |
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252 | chunk = timedelta(days=int(c.date_chunk)) |
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253 | |
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254 | if c.basetime == 0: |
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255 | start = start - timedelta(days=1) |
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256 | |
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257 | if not c.purefc and fluxes and not c.basetime == 0: |
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258 | start = start - timedelta(days=1) |
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259 | end = end + timedelta(days=1) |
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260 | |
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261 | return start, end, chunk |
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262 | |
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263 | def remove_old(pattern, inputdir): |
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264 | '''Deletes old retrieval files from current input directory |
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265 | matching the pattern. |
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266 | |
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267 | Parameters |
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268 | ---------- |
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269 | pattern : str |
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270 | The sub string pattern which identifies the files to be deleted. |
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271 | |
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272 | inputdir : str, optional |
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273 | Path to the directory where the retrieved data is stored. |
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274 | |
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275 | Return |
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276 | ------ |
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277 | |
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278 | ''' |
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279 | print('... removing old content of ' + inputdir) |
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280 | |
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281 | tobecleaned = UioFiles(inputdir, pattern) |
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282 | tobecleaned.delete_files() |
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283 | |
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284 | return |
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285 | |
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286 | |
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287 | def do_retrievement(c, server, start, end, delta_t, fluxes=False): |
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288 | '''Divides the complete retrieval period in smaller chunks and |
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289 | retrieves the data from MARS. |
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290 | |
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291 | Parameters |
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292 | ---------- |
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293 | c : ControlFile |
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294 | Contains all the parameters of CONTROL file and |
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295 | command line. |
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296 | |
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297 | server : ECMWFService or ECMWFDataServer |
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298 | The server connection to ECMWF. |
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299 | |
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300 | start : datetime |
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301 | The start date of the retrieval. |
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302 | |
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303 | end : datetime |
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304 | The end date of the retrieval. |
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305 | |
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306 | delta_t : datetime |
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307 | Delta_t + 1 is the maximal time period of a single |
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308 | retrieval. |
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309 | |
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310 | fluxes : boolean, optional |
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311 | Decides if the flux parameters are to be retrieved or |
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312 | the rest of the parameter list. |
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313 | Default value is False. |
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314 | |
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315 | Return |
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316 | ------ |
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317 | |
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318 | ''' |
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319 | |
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320 | # since actual day also counts as one day, |
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321 | # we only need to add datechunk - 1 days to retrieval |
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322 | # for a period |
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323 | delta_t_m1 = delta_t - timedelta(days=1) |
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324 | |
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325 | day = start |
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326 | while day <= end: |
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327 | flexpart = EcFlexpart(c, fluxes) |
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328 | tmpday = day + delta_t_m1 |
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329 | if tmpday < end: |
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330 | dates = day.strftime("%Y%m%d") + "/to/" + \ |
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331 | tmpday.strftime("%Y%m%d") |
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332 | else: |
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333 | dates = day.strftime("%Y%m%d") + "/to/" + \ |
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334 | end.strftime("%Y%m%d") |
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335 | |
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336 | print("... retrieve " + dates + " in dir " + c.inputdir) |
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337 | |
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338 | try: |
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339 | flexpart.retrieve(server, dates, c.public, c.request, c.inputdir) |
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340 | except IOError: |
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341 | my_error(c.mailfail, 'MARS request failed') |
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342 | |
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343 | day += delta_t |
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344 | |
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345 | return |
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346 | |
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347 | if __name__ == "__main__": |
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348 | main() |
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