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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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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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How to Vertical align elements in a div?
I have a div with two images and an h1 . All of them need to be vertically aligned within the div, next to each other.
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How do I localize the jQuery UI Datepicker?
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Display current time in 12 hour format with AM/PM
Currently the time displayed as 13:35 PM
However I want to display as 12 hour format with AM/PM, i.e 1:35 PM instead of 13:35 PM
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How do I get the row count of a pandas DataFrame?
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14 Answers
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SQL - The conversion of a varchar data type to a datetime data type resulted in an out-of-range valu
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16 Answers
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Python extract pattern matches
Python 2.7.1
I am trying to use python regular expression to extract words inside of a pattern
9 Answers
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Select n random rows from SQL Server table
...() , and then selecting from that table where the random number column < 0.1. I'm looking for a simpler way to do it, in a single statement if possible.
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What is a Context Free Grammar?
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A context free grammar is a grammar which satisfies certain properties. In computer science, g...