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Fix incorrect example in wide_to_long docstring #25736

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Fix incorrect example in wide_to_long docstring #25736

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d472c17
Fix incorrect example in wide_to_long docstring
Mar 14, 2019
5bda59c
Merge branch 'master' into update-docs
bharatr21 Mar 14, 2019
26a28d5
More changes to docstring, added CI, removed whatsnew courtesy @TomAu…
Mar 15, 2019
cda32f0
Fixed ellipsis, added back whatsnew
Mar 15, 2019
aebff33
Final doctest fix
Mar 15, 2019
87a0867
Final doctest fix
Mar 15, 2019
e7b1679
Final doctest fix
Mar 15, 2019
b182905
Merge remote-tracking branch 'upstream/master' into update-docs
Mar 20, 2019
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13 changes: 5 additions & 8 deletions pandas/core/reshape/melt.py
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Original file line number Diff line number Diff line change
Expand Up @@ -333,14 +333,11 @@ def wide_to_long(df, stubnames, i, j, sep="", suffix=r'\d+'):
... 'X' : np.random.randint(3, size=3)})
>>> df['id'] = df.index
>>> df # doctest: +NORMALIZE_WHITESPACE, +ELLIPSIS
A(quarterly)-2010 A(quarterly)-2011 B(quarterly)-2010 ...
0 0.548814 0.544883 0.437587 ...
1 0.715189 0.423655 0.891773 ...
2 0.602763 0.645894 0.963663 ...
X id
0 0 0
1 1 1
2 1 2
A(quarterly)-2010 A(quarterly)-2011 B(quarterly)-2010 ... X id
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Is the output too wide to include all the columns without any ellipses?

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Yes @TomAugspurger the line is too wide to include all columns, so deleted only "B(quarterly)-2011" column (88 > 79 chars on pycodestyle and flake8)

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Hrm, that's a little unfortunate as all the columns are important :/

Well, for now, let's use ellipses. FYI, your spacing is just slightly off, so it failed again :)

diff --git a/pandas/core/reshape/melt.py b/pandas/core/reshape/melt.py
index cec4c609c..df144db50 100644
--- a/pandas/core/reshape/melt.py
+++ b/pandas/core/reshape/melt.py
@@ -334,9 +334,9 @@ def wide_to_long(df, stubnames, i, j, sep="", suffix=r'\d+'):
     >>> df['id'] = df.index
     >>> df # doctest: +NORMALIZE_WHITESPACE, +ELLIPSIS
        A(quarterly)-2010  A(quarterly)-2011  B(quarterly)-2010  ...  X  id
-    0           0.548814           0.544883           0.437587  ...  0  0
-    1           0.715189           0.423655           0.891773  ...  1  1
-    2           0.602763           0.645894           0.963663  ...  2  2
+    0           0.548814           0.544883           0.437587  ...  0   0
+    1           0.715189           0.423655           0.891773  ...  1   1
+    2           0.602763           0.645894           0.963663  ...  1   2
 
     >>> pd.wide_to_long(df, ['A(quarterly)', 'B(quarterly)'], i='id',
     ...                 j='year', sep='-')

I think you need an extra space so that the values in id are under the d.

0 0.548814 0.544883 0.437587 ... 0 0
1 0.715189 0.423655 0.891773 ... 1 1
2 0.602763 0.645894 0.963663 ... 2 2

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Can delete this line I think.


>>> pd.wide_to_long(df, ['A(quarterly)', 'B(quarterly)'], i='id',
... j='year', sep='-')
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