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Initializing a list to a known number of elements in Python [duplicate]
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This way of initializing a Python array is evil: a=[[]]*2; a[0].append('foo'); now inspect a[1], and you will be shocked. In contrast a=[[] for k in range(2)] works fine.
– Joachim W
Aug 12 '13 at 21:40
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Python import csv to list
...s the second line', 'Line2'), ('This is the third line', 'Line3')]
Old Python 2 answer, also using the csv module:
import csv
with open('file.csv', 'rb') as f:
reader = csv.reader(f)
your_list = list(reader)
print your_list
# [['This is the first line', 'Line1'],
# ['This is the secon...
What is the fastest way to check if a class has a function defined?
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It works in both Python 2 and Python 3
hasattr(connection, 'invert_opt')
hasattr returns True if connection object has a function invert_opt defined. Here is the documentation for you to graze
https://docs.python.org/2/library/functions.h...
How can I remove non-ASCII characters but leave periods and spaces using Python?
...XYZ
!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~ \t\n\r\x0b\x0c
EDIT: On Python 3, filter will return an iterable. The correct way to obtain a string back would be:
''.join(filter(lambda x: x in printable, s))
share
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Log exception with traceback
How can I log my Python errors?
10 Answers
10
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Python assigning multiple variables to same value? list behavior
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If you're coming to Python from a language in the C/Java/etc. family, it may help you to stop thinking about a as a "variable", and start thinking of it as a "name".
a, b, and c aren't different variables with equal values; they're different na...
How to safely open/close files in python 2.4
I'm currently writing a small script for use on one of our servers using Python. The server only has Python 2.4.4 installed.
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Getting name of windows computer running python script?
...ly, I have a couple Windows computers on my network that will be running a python script. A different set of configuration options should be used in the script depending on which computer is running this script.
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JSONDecodeError: Expecting value: line 1 column 1 (char 0)
...re is no need to use simplejson library, the same library is included with Python as the json module.
There is no need to decode a response from UTF8 to unicode, the simplejson / json .loads() method can handle UTF8 encoded data natively.
pycurl has a very archaic API. Unless you have a specific req...
How to read the RGB value of a given pixel in Python?
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It's probably best to use the Python Image Library to do this which I'm afraid is a separate download.
The easiest way to do what you want is via the load() method on the Image object which returns a pixel access object which you can manipulate like an a...