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other:python:misc_by_jyp [2021/08/18 14:04] jypeter Added pprint section |
other:python:misc_by_jyp [2021/08/25 12:40] jypeter [Working with paths and filenames] Improved example |
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* [[https://docs.python.org/3/library/pathlib.html#correspondence-to-tools-in-the-os-module|Matching pathlib, and os or os.path functions]] | * [[https://docs.python.org/3/library/pathlib.html#correspondence-to-tools-in-the-os-module|Matching pathlib, and os or os.path functions]] | ||
* [[https://docs.python.org/3/library/shutil.html|High-level file operations]] | * [[https://docs.python.org/3/library/shutil.html|High-level file operations]] | ||
+ | |||
+ | |||
+ | === Example: getting the full path of the Python used === | ||
+ | |||
+ | Note: the actual python may be different from the default python! | ||
+ | |||
+ | <code>$ which python | ||
+ | /usr/bin/python | ||
+ | |||
+ | $ /modfs/modtools/miniconda3//envs/analyse_3.6_test/bin/python | ||
+ | >>> import sys, shutil | ||
+ | >>> shutil.which('python') | ||
+ | '/usr/bin/python' | ||
+ | >>> sys.executable | ||
+ | '/modfs/modtools/miniconda3//envs/analyse_3.6_test/bin/python'</code> | ||
+ | |||
+ | |||
+ | === Example: getting the full path of a script === | ||
+ | |||
+ | <code>>>> import os | ||
+ | >>> os.getcwd() | ||
+ | '/home/jypmce/PMIP4' | ||
+ | >>> os.path.exists('./argv_test.py') | ||
+ | True | ||
+ | >>> os.path.abspath('./argv_test.py') | ||
+ | '/home/jypmce/PMIP4/argv_test.py' | ||
+ | >>> os.path.exists('/home/jypmce/PMIP4/argv_test.py') | ||
+ | True | ||
+ | </code> | ||
+ | |||
=== Example: getting the size(s) of all the files in a directory === | === Example: getting the size(s) of all the files in a directory === | ||
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==== Using ordered dictionaries ==== | ==== Using ordered dictionaries ==== | ||
- | Check the [[https://realpython.com/python-ordereddict/|OrderedDict vs dict in Python: The Right Tool for the Job]] tutorial | + | **Dictionary order is guaranteed to be insertion order**! Note that the [[https://docs.python.org/3/library/stdtypes.html#dict|usual Python dictionary]] also guarantees the order since version **3.6** |
+ | |||
+ | Check the [[https://docs.python.org/3/library/collections.html#collections.OrderedDict|OrderedDict class]] (''from collections import OrderedDict'') and the [[https://realpython.com/python-ordereddict/|OrderedDict vs dict in Python: The Right Tool for the Job]] tutorial | ||
==== Printing a readable version of long lists or dictionaries ==== | ==== Printing a readable version of long lists or dictionaries ==== |