《笨办法学Python》习题18：命名，变量，代码，函数

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错误代码：（编译时一直报错）IndentationError:expected an indented block：说明此处需要缩进

# this one is like your scripts with argv
def print_two(*args):
arg1, arg2 = args
print "arg1: %r, arg2: %r" % (arg1, arg2)

# ok, that *args is actually pointless, we can just do this
def print_two_again(arg1, arg2):
print "arg1: %r, arg2: %r" % (arg1, arg2)

# this just takes one argument
def print_one(arg1):
print "arg1: %r" % arg1

# this one takes no arguments
def print_none():
print"I got nothing'."


print_two("Zed","Shaw")
print_two_again("Zed","Shaw")
print_one("First!")
print_none()

改正后的代码：（加上了空格）

# this one is like your scripts with argv
def print_two(*args):    #Python 创建一个函数，我们使用到的命令是 def ，也就是“定义(define)”的意思。
    arg1, arg2 = args    #冒号以下，使用 4 个空格缩进的行都是属于 print_two 这个函数的内容。
    print "arg1: %r, arg2: %r" % (arg1, arg2)

# ok, that *args is actually pointless, we can just do this
def print_two_again(arg1, arg2):
    print "arg1: %r, arg2: %r" % (arg1, arg2)

# this just takes one argument
def print_one(arg1):
    print "arg1: %r" % arg1

# this one takes no arguments
def print_none():
    print"I got nothing'."


print_two("Zed","Shaw")
print_two_again("Zed","Shaw")
print_one("First!")
print_none()

做这道题的感受：python对格式的要求真的很高啊！