![]() ![]() ![]() So if you want to write 2 variable as a CSV row you can put them in a tuple or list: writer.writerows((variable1,2))Īlso from itertools you can import zip_longest as a more flexible function which you can use it on iterators with different size. In this case since zip's arguments must support iteration you can not use 2 as its argument. Replace import iziplongest with import ziplongest, as noted in your original question, and then save version.py. import csv from itertools import izip a izip(csv.reader(open('TDM.csv', 'rb'))) csv.writer(open('output.csv', 'wb')).writerows(a) Unfortunately the following error occurs: from itertools import izip ImportError: cannot import name 'izip' I already looked through the forums but couldnt find the right answer for me. Print(timeit('list(izip(xrange(100), xrange(100)))', This module implements a number of iterator building blocks inspired by constructs from APL, Haskell, and SML. Here is a benchmark between zip in Python 2 and 3 and izip in Python 2: But yes, it is that simple to import the module in Python. You'll still have to import the itertools module to use it. You can import itertools in your Python code with the following commands import itertools import operator view raw importitertools.py hosted with by GitHub We have also imported the operator module as we will be using algebraic operators along with itertools. islice () wasn't ported into the built-in namespace of Python 3. They all return iterators and don't require imports. The zip implementation is almost completely copy-pasted from the old izip, just with a few names changed and pickle support added. Note: As of Python 3, filter (), map () and zip () are functionally equivalent to Python 2's itertools functions ifilter (), imap () and izip (). In Python 3 the built-in zip does the same job as itertools.izip in 2.X(returns an iterator instead of a list). ![]()
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