Subtract a value from every number in a list in Python

Question

I have a list   a    49  51  53  56    How do I subtract 13 from each integer value in the list

User · Answer

This will work   for i in range len a      a i  -  13

User · Answer

To clarify an already posted solution due to questions in the comments  import numpy  array   numpy array  49  51  53  56   array   array - 13   will output      array  36  38  40  43

User · Answer

If are you working with numbers a lot  you might want to take a look at NumPy  It lets you perform all kinds of operation directly on numerical arrays  For example    gt  gt  gt  import numpy  gt  gt  gt  array   numpy array  49  51  53  56    gt  gt  gt  array - 13 array  36  38  40  43

User · Answer

With a list comprehension   a    x - 13 for x in a

User · Answer

You can use map   function   a   list map lambda x  x - 13  a

[python] Subtract a value from every number in a list in Python?

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