Line Comments

Line comments in Python are very simple.  The # character denotes that everything afterward on that line is a comment.  

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#here is a whole-line comment for some code
x = 3   #this comments code on the current line

Block Comments

Unfortunately, there is no specific syntax for block comments in python.  To comment a block of code, you must simply place a # before every line in the block of code you wish to comment.  Many Python IDE's, however, provide a simple way to comment out a block of code.  A tricky way of quickly block-commenting a large block of code is to prefix the block with if False: and then indent the block to be commented.  Just remember un-indent and delete the conditional afterward!