Python2

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Acomment,thisissoyoucanreadyourprogramlater.Anything after the isignoredbypython.print“Icouldhavecodelikethies.”and the comment after is ignored
Youcanalsouseacommentto“disable”orcommentoutapieceofcode:print “This won’t run.”
print “This will run.”

save to a file named ex2.py
($ is #)

note:
多行注释可以收尾各用三个连续的单引号或者双引号括起来。