python 3, windows 7. found out in python 3 join() function works on strings (what!? why?). need work on anything.
eg.
lista = [1,2,3,"hey","woot",2.44] print (" ".join(lista)) 1 2 3 hey woot 2.44 also tell me why supports strings?
it supporst string becuase output of "".join() in string format:
lista = [1,2,3,"hey","woot",2.44] print (" ".join(map(str,lista))) print type(" ".join(map(str,lista))) 1 2 3 hey woot 2.44 <type 'str'> this due fact can not append int/float , string:
i.e.)
"a"+2 --------------------------------------------------------------------------- typeerror traceback (most recent call last) <ipython-input-232-902dbc9d2568> in <module>() ----> 1 "a"+2 typeerror: cannot concatenate 'str' , 'int' objects lista = [1,2,3,"hey","woot",2.44] print (" ".join(lista)) --------------------------------------------------------------------------- typeerror traceback (most recent call last) <ipython-input-235-f57f2c8c638f> in <module>() 1 lista = [1,2,3,"hey","woot",2.44] ----> 2 print (" ".join(lista)) 3 typeerror: sequence item 0: expected string, int found when done join:
lista = [1,2,3,"hey","woot",2.44] print (" ".join(lista)) --------------------------------------------------------------------------- typeerror traceback (most recent call last) <ipython-input-235-f57f2c8c638f> in <module>() 1 lista = [1,2,3,"hey","woot",2.44] ----> 2 print (" ".join(lista)) 3 typeerror: sequence item 0: expected string, int found it stating element @ 0 index int instead of string argument
internally join iterate on list(iterable objects) , append prefix in case " " space , provide string output so "".join() not support int/float
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