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--- other:python:misc_by_jyp [2021/08/27 13:56] – Added file name generation section jypeter
+++ other:python:misc_by_jyp [2021/10/26 13:42] – [Sorting] Added content jypeter
@@ Line 170: / Line 170: @@
 The [[https://docs.python.org/3/library/pprint.html|pprint]] module can be used for //pretty printing// objects (lists, dictionaries, ...). It will wrap long lines in a meaningful way
-<code>>>> from collections import OrderedDict
+<code>>>> import pprint
->>> test_dic = OrderedDict([('AWI-ESM-1-1-LR_AWI', {'r1i1p1f1': {'grid': 'gn'}}), ('CESM2_NCAR', {'r1i1p1f1': {'grid': 'gn'}}), ('IPSL-CM6A-LR_IPSL', {'r1i1p1f1': {'grid': 'gr'}, 'r1i1p1f2': {'grid': 'gr'}, 'r1i1p1f3': {'grid': 'gr'}, 'r1i1p1f4': {'grid': 'gr'}})])
+>>> test_dic = {'AWI-ESM-1-1-LR_AWI':{'r1i1p1f1': {'grid': 'gn'}}, 'CESM2_NCAR':{'r1i1p1f1': {'grid': 'gn'}}, 'IPSL-CM6A-LR_IPSL':{'r1i1p1f1': {'grid': 'gr'}, 'r1i1p1f2': {'grid': 'gr'}, 'r1i1p1f3': {'grid': 'gr'}, 'r1i1p1f4': {'grid': 'gr'}}}
 >>> print(test_dic)
-OrderedDict([('AWI-ESM-1-1-LR_AWI', {'r1i1p1f1': {'grid': 'gn'}}), ('CESM2_NCAR', {'r1i1p1f1': {'grid': 'gn'}}), ('IPSL-CM6A-LR_IPSL', {'r1i1p1f1': {'grid': 'gr'}, 'r1i1p1f2': {'grid': 'gr'}, 'r1i1p1f3': {'grid': 'gr'}, 'r1i1p1f4': {'grid': 'gr'}})])
+{'AWI-ESM-1-1-LR_AWI': {'r1i1p1f1': {'grid': 'gn'}}, 'CESM2_NCAR': {'r1i1p1f1': {'grid': 'gn'}}, 'IPSL-CM6A-LR_IPSL': {'r1i1p1f1': {'grid': 'gr'}, 'r1i1p1f2': {'grid': 'gr'}, 'r1i1p1f3': {'grid': 'gr'}, 'r1i1p1f4': {'grid': 'gr'}}}
 >>> pprint.pprint(test_dic)
-OrderedDict([('AWI-ESM-1-1-LR_AWI', {'r1i1p1f1': {'grid': 'gn'}}),
+{'AWI-ESM-1-1-LR_AWI': {'r1i1p1f1': {'grid': 'gn'}},
-             ('CESM2_NCAR', {'r1i1p1f1': {'grid': 'gn'}}),
+ 'CESM2_NCAR': {'r1i1p1f1': {'grid': 'gn'}},
-             ('IPSL-CM6A-LR_IPSL',
+ 'IPSL-CM6A-LR_IPSL': {'r1i1p1f1': {'grid': 'gr'},
-              {'r1i1p1f1': {'grid': 'gr'},
+                       'r1i1p1f2': {'grid': 'gr'},
-               'r1i1p1f2': {'grid': 'gr'},
+                       'r1i1p1f3': {'grid': 'gr'},
-               'r1i1p1f3': {'grid': 'gr'},
+                       'r1i1p1f4': {'grid': 'gr'}}}
-               'r1i1p1f4': {'grid': 'gr'}})])
+>>> dir(test_dic)
+['__class__', '__contains__', '__delattr__', [... lots of unreadable stuff removed...] 'setdefault', 'update', 'values']
+>>> pprint.pprint(dir(test_dic))
+['__class__',
+ '__contains__',
+[... lots of lines removed in this example ]
+ 'setdefault',
+ 'update',
+ 'values']
 </code>
+==== Sorting ====
+  * [[https://docs.python.org/3/howto/sorting.html|Sorting HOW TO]]
+  * Example: sorting the keys and the values of a dictionary, and then using the ''key'' parameter to sort the keys of a dictionary according to the value associated with the key
+    * If we provide a ''key'' function, the ''sort'' function will sort the elements by the values returned by the function, instead of sorting by the initial values. The function used for generating the key below is very simple and we can use a //lambda// (i.e //in place//) function
+    * <code>>>> demo_dic = {'a':10, 'b':5, 'c':-1, 'd':0}
+>>> sorted(demo_dic.keys())
+['a', 'b', 'c', 'd']
+>>> sorted(demo_dic.values())
+[-1, 0, 5, 10]
+>>> sorted(demo_dic.keys(), key=lambda key_name:demo_dic[key_name])
+['c', 'd', 'b', 'a']</code>
 /*