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Assign pandas dataframe column dtypes
...= pd.DataFrame({'x': {0: 'a', 1: 'b'}, 'y': {0: '1', 1: '2'}, 'z': {0: '2018-05-01', 1: '2018-05-02'}})
df.dtypes
x object
y object
z object
dtype: object
df
x y z
0 a 1 2018-05-01
1 b 2 2018-05-02
You can apply these to each column you want to convert:
df["y"] = ...
C# HttpWebRequest vs WebRequest
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edited Jan 8 '14 at 19:37
answered May 22 '09 at 3:38
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Python datetime - setting fixed hour and minute after using strptime to get day,month,year
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answered Sep 18 '12 at 0:28
nneonneonneonneo
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'float' vs. 'double' precision
...a decimal one.
Single precision (float) gives you 23 bits of significand, 8 bits of exponent, and 1 sign bit.
Double precision (double) gives you 52 bits of significand, 11 bits of exponent, and 1 sign bit.
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What does the @ symbol represent in objective-c?
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answered Aug 25 '08 at 8:36
Chris HansonChris Hanson
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What does && mean in void *p = &&abc;
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Prasoon SauravPrasoon Saurav
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Matplotlib: draw grid lines behind other graph elements
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edited Jul 2 '19 at 18:15
Hendrik
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answered Nov 13 '09 at 1:13
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How to index into a dictionary?
...ct. Or use a list of pairs
l = [("blue", "5"), ("red", "6"), ("yellow", "8")]
if you don't need access by key. (Why are your numbers strings by the way?)
In Python 3.7, normal dictionaries are ordered, so you don't need to use OrderedDict anymore (but you still can – it's basically the same ...
UnicodeDecodeError, invalid continuation byte
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In binary, 0xE9 looks like 1110 1001. If you read about UTF-8 on Wikipedia, you’ll see that such a byte must be followed by two of the form 10xx xxxx. So, for example:
>>> b'\xe9\x80\x80'.decode('utf-8')
u'\u9000'
But that’s just the mechanical cause of the exception. ...
Opacity of div's background without affecting contained element in IE 8?
... set Opacity of div's background without affecting contained element in IE 8. have a any solution and don't answer to set 1 X 1 .png image and set opacity of that image because I am using dynamic opacity and color admin can change that
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