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Writing string to a file on a new line every time
...ing every time I call file.write() . What's the easiest way to do this in Python?
10 Answers
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Binary Data in JSON String. Something better than Base64
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Python 3.4 includes base64.b85encode() and b85decode() now. A simple encode+decode timing measurement shows that b85 is more than 13 times slower than b64. So we have a 7% size win, but 1300% performance loss.
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Pairs from single list
...nd the need to process a list by pairs. I was wondering which would be the pythonic and efficient way to do it, and found this on Google:
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_csv.Error: field larger than field limit (131072)
... sys
import csv
csv.field_size_limit(sys.maxsize)
sys.maxsize works for Python 2.x and 3.x. sys.maxint would only work with Python 2.x (SO: what-is-sys-maxint-in-python-3)
Update
As Geoff pointed out, the code above might result in the following error: OverflowError: Python int too large to con...
How to rename a file using Python
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As of Python 3.4 one can use the pathlib module to solve this.
If you happen to be on an older version, you can use the backported version found here
Let's assume you are not in the root path (just to add a bit of difficulty to i...
How to check if a float value is a whole number
...gt; (1.555).is_integer()
False
The method was added to the float type in Python 2.6.
Take into account that in Python 2, 1/3 is 0 (floor division for integer operands!), and that floating point arithmetic can be imprecise (a float is an approximation using binary fractions, not a precise real num...
Why does modern Perl avoid UTF-8 by default?
...=>"is",level => 1)->eq("d", " ð") is false. Similarly, "ae" and "æ" are eq if you don’t use locales, or if you use the English one, but they are different in the Icelandic locale. Now what? It’s tough, I tell you. You can play with ucsort to test some of these things out.
Consider ...
Print a string as hex bytes?
I have this string: Hello world !! and I want to print it using Python as 48:65:6c:6c:6f:20:77:6f:72:6c:64:20:21:21 .
13...
HTML5 Canvas vs. SVG vs. div
What is the best approach for creating elements on the fly and being able to move them around? For example, let's say I want to create a rectangle, circle and polygon and then select those objects and move them around.
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How do I remove/delete a folder that is not empty?
...line 31, in <module> shutil.rmtree(thistestdir) File "/usr/lib/python2.6/shutil.py", line 225, in rmtree onerror(os.rmdir, path, sys.exc_info()) File "/usr/lib/python2.6/shutil.py", line 223, in rmtree os.rmdir(path) OSError: [Errno 90] Directory not empty: '/path/to/rmtree'
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