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How can I open the interactive matplotlib window in IPython notebook?
... Works for me now (2014-08) using current release of Python 2.7 on Win7 x64.
– nerdfever.com
Aug 29 '14 at 1:31
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Pythonic way to find maximum value and its index in a list?
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This was on 2.7
– portforwardpodcast
Dec 7 '17 at 11:11
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Is there any pythonic way to combine two dicts (adding values for keys that appear in both)?
...could also use for k in b.viewkeys() & a.viewkeys(), when using python 2.7, and skip the creation of sets.
– Martijn Pieters♦
Jun 13 '12 at 10:32
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What's the bad magic number error?
...b3: 62101
2.5b3: 62111
2.5c1: 62121
2.5c2: 62131
2.6a0: 62151
2.6a1: 62161
2.7a0: 62171
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Reading a huge .csv file
I'm currently trying to read data from .csv files in Python 2.7 with up to 1 million rows, and 200 columns (files range from 100mb to 1.6gb). I can do this (very slowly) for the files with under 300,000 rows, but once I go above that I get memory errors. My code looks like this:
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builtins.TypeError: must be str, not bytes
I've converted my scripts from Python 2.7 to 3.2, and I have a bug.
2 Answers
2
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How can I open multiple files using “with open” in Python?
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As of Python 2.7 (or 3.1 respectively) you can write
with open('a', 'w') as a, open('b', 'w') as b:
do_something()
In earlier versions of Python, you can sometimes use
contextlib.nested() to nest context managers. This won't work...
Add text to Existing PDF using Python
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Example for [Python 2.7]:
from pyPdf import PdfFileWriter, PdfFileReader
import StringIO
from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import letter
packet = StringIO.StringIO()
# create a new PDF with Reportlab
can = canvas...
How can I check if an ip is in a network in Python?
... I think your solution has a serious bug: addressInNetwork('172.7.1.1', '172.3.0.0/16') -> True (I converted 'L' to '<L' in my 64bit os)
– Taha Jahangir
Feb 10 '12 at 5:01
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How can I use a C++ library from node.js?
...compile issues with node-ffi. It's a major PITA! Is it dependent on Python 2.7 or is that just the build process? There must be a LoadLibrary mechanism in NodeJS for a standard Win32 DLL?
– tgraupmann
Oct 30 '19 at 20:48
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