Python checks to see if the array element exists similar to the PHP isset () method _python

There are isset methods in PHP to check whether an array element exists, and there is no corresponding function in Python.

Python's programming philosophy is "containment errors" rather than "rigorous checks." Examples are as follows:

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Look before for you Leap (Lbyl):

If IDX < len (array):
ARRAY[IDX]
Else
#handle this

Easier to ask forgiveness than permission (EAFP):


Try
ARRAY[IDX]
Except Indexerror:
#handle this

So in Python you can usually handle the absence of an array element with an exception without having to check it in advance.

If you do not want to see exception handling, you can do this as follows:

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If ' Test ' in [' demo ', ' Example ']:

...

Else

...