设置一个特殊的标记来声明文件的编码。如果不需要 ASCII 字符,我们 [...] to the variable i [...] # assign the string
.sendmail(fromm, [to], mail.as_string [...] recommended way to document [...] to print depth
characters in a string [...] integers 1 to 4:") for i [...] ): # xrange is similar to