파이썬(python) – 내장모듈 import, block 들여쓰기(indentation)

dplee@dplee-VirtualBox:~$ python

Python 2.7.2+ (default, Oct  4 2011, 20:06:09) 

[GCC 4.6.1] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import sys  # sys 모듈을 포함시킴
>>> dir(sys)     # sys 모듈에 포함된 symbol list 를 모두 보여줌.

['__displayhook__', '__doc__', '__excepthook__', '__name__',
'__package__', '__stderr__', '__stdin__', '__stdout__',
'_clear_type_cache', '_current_frames', '_getframe', '_mercurial',
'api_version', 'argv', 'builtin_module_names', 'byteorder',
'call_tracing', 'callstats', 'copyright', 'displayhook',
'dont_write_bytecode', 'exc_clear', 'exc_info', 'exc_type',
'excepthook', 'exec_prefix', 'executable', 'exit', 'flags',
'float_info', 'float_repr_style', 'getcheckinterval',
'getdefaultencoding', 'getdlopenflags', 'getfilesystemencoding',
'getprofile', 'getrecursionlimit', 'getrefcount', 'getsizeof',
'gettrace', 'hexversion', 'long_info', 'maxint', 'maxsize',
'maxunicode', 'meta_path', 'modules', 'path', 'path_hooks',
'path_importer_cache', 'platform', 'prefix', 'ps1', 'ps2',
'py3kwarning', 'pydebug', 'setcheckinterval', 'setdlopenflags',
'setprofile', 'setrecursionlimit', 'settrace', 'stderr', 'stdin',
'stdout', 'subversion', 'version', 'version_info', 'warnoptions']

>>> help(sys)        # sys 모듈에 대한 설명을 보여주는 document
>>> help(sys.exit)  # sys 모듈에 포함된 exit 함수에 대한 document

#!/usr/bin/python

import sys

# argument 를 별도로 선언할 필요도 없다.
def Hello(name):
  name = name + '!!!!!!'
  nprint 'Hello', name

def main():
  Hello(sys.argv[1])

if __name__ == '__main__':
  main()

sh> ./hello.py Alice

#!/usr/bin/python

import sys

def Hello(name):
# or, and 를 이용
    if name == 'Alice' or name == 'Nick':
        print 'Alert : Alice Mode'
        name = name + '???'
    else:
        print 'Else'
    name = name + '!!!!!!'
    print 'Hello', name

def main():
    Hello(sys.argv[1])

if __name__ == '__main__':
    main()

#!/usr/bin/python

import sys

def Hello(name):
    if name == 'Alice' or name == 'Nick':  # or, and 를 이용
        print 'Alert : Alice Mode'
        name = name + '???'
    else:
        NoDefFunc(name)      # 정의되지 않은 함수 사용
    name = name + '!!!!!!'
    print 'Hello', name

def main():
    Hello(sys.argv[1])

if __name__ == '__main__':
    main()

$ sh> ./hello.py Alice

Alert : Alice Mode
Hello Alice???!!!!!!