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How do I get the row count of a pandas DataFrame?
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Is there a Public FTP server to test upload and download? [closed]
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Tele2 provides ftp://speedtest.tele2.net , you can log in as anonymous and upload anything to ...
Is there any difference between the `:key => “value”` and `key: “value”` hash notations?
...ference between :key => "value" (hashrocket) and key: "value" (Ruby 1.9) notations?
5 Answers
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How do I create a dictionary with keys from a list and values defaulting to (say) zero? [duplicate]
I have a = [1,2,3,4] and I want d = {1:0, 2:0, 3:0, 4:0}
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JPA: unidirectional many-to-one and cascading delete
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edited Jun 25 '13 at 14:31
Vlasec
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add a string prefix to each value in a string column using Pandas
...gt;>> df = pd.DataFrame({'col':['a',0]})
>>> df
col
0 a
1 0
>>> df['col'] = 'str' + df['col'].astype(str)
>>> df
col
0 stra
1 str0
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How does the static modifier affect this code?
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116
In Java two phases take place: 1. Identification, 2. Execution
In identification phase all st...
Get the key corresponding to the minimum value within a dictionary
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How to remove underline from a link in HTML?
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194
Inline version:
<a href="http://yoursite.com/" style="text-decoration:none">yoursite<...
Get Image size WITHOUT loading image into memory
... load the image into memory when calling .open. Looking at the docs of PIL 1.1.7, the docstring for .open says:
def open(fp, mode="r"):
"Open an image file, without loading the raster data"
There are a few file operations in the source like:
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prefix = fp.read(16)
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fp.seek(0)
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