Looping from 1 to infinity in Python

by

Using itertools.count:

import itertools
for i in itertools.count(start=1):
    if there_is_a_reason_to_break(i):
        break

In Python 2, range() and xrange() were limited to sys.maxsize. In Python 3 range() can go much higher, though not to infinity:

import sys
for i in range(sys.maxsize**10):  # you could go even higher if you really want
    if there_is_a_reason_to_break(i):
        break

So it’s probably best to use count().

More Related Contents:

  1. How to do for loop through all items of a list except the first [duplicate]
  2. Faster version of ‘pygame.event.get()’. Why are events being missed and why are the events delayed?
  3. What is the difference between range and xrange functions in Python 2.X?
  4. Removing Item From List – during iteration – what’s wrong with this idiom?
  5. How do I count occurrence of unique values inside a list
  6. How to retry after exception?
  7. What does a for loop within a list do in Python?
  8. How to iterate over a list in chunks
  9. What is the difference between i = i + 1 and i += 1 in a ‘for’ loop? [duplicate]
  10. How do I loop through a list by twos? [duplicate]
  11. Django template can’t loop defaultdict
  12. Python: Continuing to next iteration in outer loop
  13. Why do I get “List index out of range” when trying to add consecutive numbers in a list using “for i in list”? [duplicate]
  14. Converting for loops to while loops in python
  15. Python nested looping Idiom
  16. python: read json and loop dictionary
  17. How to increment variable names/Is this a bad idea [duplicate]
  18. Loop until a specific user input [duplicate]
  19. what is the difference between return and break in python?
  20. Is there a “do … until” in Python? [duplicate]
  21. How can I avoid “RuntimeError: dictionary changed size during iteration” error?
  22. Is it possible to make a `for` loop without an iterator variable? (How can I make make code loop a set number of times?)
  23. Updating a value in a pandas dataframe in an iterrows loop
  24. Where to use the return statement with a loop?
  25. Loop through list with both content and index [duplicate]
  26. Assignment Condition in Python While Loop
  27. Is there a reason Python 3 enumerates slower than Python 2?
  28. Count duplicates between 2 lists
  29. Run an infinite loop in the backgroung in Tkinter
  30. Strange result when removing item from a list while iterating over it in Python

Leave a Comment