Also note that it's not calling print as a function, but rather using parenthesis to group the expression creating the string to print (in Python 3.x it is calling print as a function): import itertools as itįor lineno, fline, dbrec in it.izip(it.count(), f, cursor):Īlso, in Python 3, the "zip" function is the same as itertools.zip, I think. def izip(args): python2 izip python3 zip if sys.versioninfo < (3,): return. You can vote up the ones you like or vote down the ones you dont like, and go to the original project or source file by following the links above each example.
#Difference between zip and izip python code#
Here is a version that reports the line number of the file, along with the mismatched data, and continues for all lines in the file. Python itertools.izip() Examples The following are 30 code examples of itertools.izip(). Print("DB content does not match original data!") Also, this version breaks immediately on finding a problem: import itertools as itĬursor.execute("SELECT COLUMN FROM TABLE") I had to modify 'itertools.ziplongest' on line 144 of 'pycalphad-masterpycalphadplotbinary.py' to 'itertools.iziplongest' to work with python 2.7.8. The resulting list is truncated to the length of the shortest input iterable.
Using zip and izip Processing arrays from the tabular data Preprocessing the columns Sorting lists Sorting with a key Working with itertools 2. In Python 2, zip() returns a list of tuples. Zip takes two equal length collections and merges them together in pairs. The first version uses a nested comprehension: Every element in pred is paired with every element in obs ( length n m ). You can use itertools.izip to avoid reading all of both sets of data before iterating. Python’s zip() function works differently in both versions of the language.
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