.sendmail(fromm, [to], mail.as_string [...] recommended way to document [...] to print depth
to the variable i [...] # assign the string "foobar" to the
characters in a string [...] integers 1 to 4:") for i [...] ): # xrange is similar to
,147,483,647 的整数。 数据类型 bool 对应 Python 类型 bool ( True [...] 类型 string 对应于 Python 类型