How to stop Python from adding whitespace while iterating?

My Python code:

mapArray = [["#","#","#"],["#","#","#"],["#","#","#"]]
for row in mapArray:
    for cell in row:
           开发者_开发知识库 print cell,
    print
print

prints this:

# # #
# # #
# # #

why not this:

###
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###

Thanks much!

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My preferred solution when I want Python to only print what I tell it to without inserting newlines or spaces is to use sys.stdout:

from sys import stdout
mapArray = [["#","#","#"],["#","#","#"],["#","#","#"]]
for row in mapArray:
    for cell in row:
            stdout.write(cell)
    stdout.write("\n")
stdout.write("\n")

The print statement documentation states, "A space is written before each object is (converted and) written, unless the output system believes it is positioned at the beginning of a line." This is why sys.stdout is the preferred solution here and is the reason why you're seeing spaces in your output.

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Change your print cell, to sys.stdout.write(cell). After importing sys, of course.

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Or you could simply use join to build the string and then print it.

>>> mapArray = [["#","#","#"],["#","#","#"],["#","#","#"]]
>>> print '\n'.join([''.join(line) for line in mapArray])
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