D
Davide Dalmasso
Hello,
I opened my Python Shell and I wrote the following:
then I made a function
return aframe - aframe.mean(axis=1)
and I defined a DataFrame with time as index
1984-12-20 -0.257916 -0.137923 -0.669796
1984-12-21 -1.632874 -1.850365 1.571715
1984-12-22 1.185828 -0.149839 -1.565930
1984-12-23 -0.757311 0.034627 0.794608
1984-12-24 0.548785 -1.126786 -0.438457
now, if I call the function the following error is generated:
Traceback (most recent call last):
File "<pyshell#6>", line 1, in <module>
afunc(A)
File "<pyshell#3>", line 2, in afunc
return aframe - aframe.mean(axis=1)
File "C:\Python33\lib\site-packages\pandas\core\frame.py", line 217, in f
return self._combine_series(other, na_op, fill_value, axis, level)
File "C:\Python33\lib\site-packages\pandas\core\frame.py", line 3601, in _combine_series
return self._combine_series_infer(other, func, fill_value)
File "C:\Python33\lib\site-packages\pandas\core\frame.py", line 3619, in _combine_series_infer
FutureWarning)
File "C:\Python33\lib\idlelib\PyShell.py", line 60, in idle_showwarning
file.write(warnings.formatwarning(message, category, filename,
AttributeError: 'NoneType' object has no attribute 'write'
then I recall the same function (without any change) and the function works!
a b c
1984-12-20 0.097295 0.217289 -0.314584
1984-12-21 -0.995699 -1.213190 2.208890
1984-12-22 1.362475 0.026808 -1.389283
1984-12-23 -0.781285 0.010652 0.770633
1984-12-24 0.887604 -0.787967 -0.099637
Why does this happen? Why I must call the function two times before it finally works?
How can I overcome this problem?
Many thanks in advance
Davide
I opened my Python Shell and I wrote the following:
then I made a function
return aframe - aframe.mean(axis=1)
and I defined a DataFrame with time as index
a b cA = pd.DataFrame(np.random.randn(5,3),columns=['a','b','c'],index=pd.date_range(start='1984-12-20',periods=5))
A
1984-12-20 -0.257916 -0.137923 -0.669796
1984-12-21 -1.632874 -1.850365 1.571715
1984-12-22 1.185828 -0.149839 -1.565930
1984-12-23 -0.757311 0.034627 0.794608
1984-12-24 0.548785 -1.126786 -0.438457
now, if I call the function the following error is generated:
Traceback (most recent call last):
File "<pyshell#6>", line 1, in <module>
afunc(A)
File "<pyshell#3>", line 2, in afunc
return aframe - aframe.mean(axis=1)
File "C:\Python33\lib\site-packages\pandas\core\frame.py", line 217, in f
return self._combine_series(other, na_op, fill_value, axis, level)
File "C:\Python33\lib\site-packages\pandas\core\frame.py", line 3601, in _combine_series
return self._combine_series_infer(other, func, fill_value)
File "C:\Python33\lib\site-packages\pandas\core\frame.py", line 3619, in _combine_series_infer
FutureWarning)
File "C:\Python33\lib\idlelib\PyShell.py", line 60, in idle_showwarning
file.write(warnings.formatwarning(message, category, filename,
AttributeError: 'NoneType' object has no attribute 'write'
then I recall the same function (without any change) and the function works!
a b c
1984-12-20 0.097295 0.217289 -0.314584
1984-12-21 -0.995699 -1.213190 2.208890
1984-12-22 1.362475 0.026808 -1.389283
1984-12-23 -0.781285 0.010652 0.770633
1984-12-24 0.887604 -0.787967 -0.099637
Why does this happen? Why I must call the function two times before it finally works?
How can I overcome this problem?
Many thanks in advance
Davide