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:

###
###
###

Thanks much!

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.

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

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

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