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Possible Duplicate:
Python ‘==’ vs ‘is’ comparing strings, ‘is’ fails sometimes, why?
In Python, what is the difference between these two statements:
if x is "odp":
if x == "odp":
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A “duplicate” refers to an exact copy of something. “Fake” refers to something being artificial or false. For example, if I print the same document twice, that's a duplicate; however, if I print the text of the constitution and say it's the original constitution, that's fake.
Definition of in duplicate 1 : so that there are two copies We were required to fill out the paperwork in duplicate. 2 : with an exact copy Please send the contract in duplicate.
A duplicate is an exact copy. A reproduction is a close copy, and especially one made after the original is no longer available.
More Definitions of Duplicate originalDuplicate original means an exact copy of a signed original, an exact copy with signatures created by the same impression as the original, or an exact copy bearing an original signature. Duplicate original .
The == operator tests for equality
The is keyword tests for object identity; whether we are talking about the same object. Note that multiple variables may refer to the same object.
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