Skip over a value in the range function in python

Question

What is the pythonic way of looping through a range of numbers and skipping over one value   For example  the range is from 0 to 100 and I would like to skip 50   Edit  Here s the code that I m using  for i in range 0  len list        x  listRow list  i      for j in range   0 to len list  not including x

User · Answer

It depends on what you want to do  For example you could stick in some conditionals like this in your comprehensions     get the squares of each number from 1 to 9  excluding 2 myList    i  2 for i in range 10  if i    2  print myList     -- gt   0  1  9  16  25  36  49  64  81

User · Answer

It is time inefficient to compare each number  needlessly leading to a linear complexity  Having said that  this approach avoids any inequality checks   import itertools  m  n   5  10 for i in itertools chain range m   range m   1  n        print i     skips m   5   As an aside  you woudn t want to use   range m    range m   1  n   even though it works because it will expand the iterables into a tuple and this is memory inefficient     Credit  comment by njzk2  answer by Locke

User · Answer

for i in range 0  101   if i    50      do sth else      pass

User · Answer

You can use any of these     Create a range that does not contain 50 for i in  x for x in xrange 100  if x    50       print i    Create 2 ranges  0 49  and  51  100   Python 2  for i in range 50    range 51  100       print i    Create a iterator and skip 50 xr   iter xrange 100   for i in xr      print i     if i    49          next xr     Simply continue in the loop if the number is 50 for i in range 100       if i    50          continue     print i

User · Answer

for i in range 100       if i    50          continue     dosomething

User · Answer

In addition to the Python 2 approach here are the equivalents for Python 3     Create a range that does not contain 50 for i in  x for x in range 100  if x    50       print i     Create 2 ranges  0 49  and  51  100  from itertools import chain concatenated   chain range 50   range 51  100   for i in concatenated      print i     Create a iterator and skip 50 xr   iter range 100   for i in xr      print i      if i    49          next xr     Simply continue in the loop if the number is 50 for i in range 100       if i    50          continue     print i    Ranges are lists in Python 2 and iterators in Python 3

User · Answer

what you could do  is put an if statement around everything inside the loop that you want kept away from the 50  e g   for i in range 0  len list        if i    50          x  listRow list  i          for j in range   0 to len list  not including x

[python] Skip over a value in the range function in python

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