import random
#assii:大写字母：65~90，小写 97~122 数字48-57
tmp = ""
for i in range(6):num =random.randrange(1,4)if num == 1:rad2 = random.randrange(0,10)tmp = tmp+str(rad2)elif num == 2:rad3 = random.randrange(97, 123)tmp = tmp + chr(rad3)else:rad1 = random.randrange(65,91)c = chr(rad1)tmp = tmp + c
print(tmp)

class TextIOWrapper(_TextIOBase):"""Character and line based layer over a BufferedIOBase object, buffer.encoding gives the name of the encoding that the stream will bedecoded or encoded with. It defaults to locale.getpreferredencoding(False).errors determines the strictness of encoding and decoding (seehelp(codecs.Codec) or the documentation for codecs.register) anddefaults to "strict".newline controls how line endings are handled. It can be None, '','\n', '\r', and '\r\n'.  It works as follows:* On input, if newline is None, universal newlines mode isenabled. Lines in the input can end in '\n', '\r', or '\r\n', andthese are translated into '\n' before being returned to thecaller. If it is '', universal newline mode is enabled, but lineendings are returned to the caller untranslated. If it has any ofthe other legal values, input lines are only terminated by the givenstring, and the line ending is returned to the caller untranslated.* On output, if newline is None, any '\n' characters written aretranslated to the system default line separator, os.linesep. Ifnewline is '' or '\n', no translation takes place. If newline is anyof the other legal values, any '\n' characters written are translatedto the given string.If line_buffering is True, a call to flush is implied when a call towrite contains a newline character."""def close(self, *args, **kwargs): # real signature unknown
        关闭文件passdef fileno(self, *args, **kwargs): # real signature unknown
        文件描述符  passdef flush(self, *args, **kwargs): # real signature unknown
        刷新文件内部缓冲区passdef isatty(self, *args, **kwargs): # real signature unknown
        判断文件是否是同意tty设备passdef read(self, *args, **kwargs): # real signature unknown
        读取指定字节数据passdef readable(self, *args, **kwargs): # real signature unknown
        是否可读passdef readline(self, *args, **kwargs): # real signature unknown
        仅读取一行数据passdef seek(self, *args, **kwargs): # real signature unknown
        指定文件中指针位置passdef seekable(self, *args, **kwargs): # real signature unknown
        指针是否可操作passdef tell(self, *args, **kwargs): # real signature unknown
        获取指针位置passdef truncate(self, *args, **kwargs): # real signature unknown
        截断数据，仅保留指定之前数据passdef writable(self, *args, **kwargs): # real signature unknown
        是否可写passdef write(self, *args, **kwargs): # real signature unknown
        写内容passdef __getstate__(self, *args, **kwargs): # real signature unknownpassdef __init__(self, *args, **kwargs): # real signature unknownpass@staticmethod # known case of __new__def __new__(*args, **kwargs): # real signature unknown""" Create and return a new object.  See help(type) for accurate signature. """passdef __next__(self, *args, **kwargs): # real signature unknown""" Implement next(self). """passdef __repr__(self, *args, **kwargs): # real signature unknown""" Return repr(self). """passbuffer = property(lambda self: object(), lambda self, v: None, lambda self: None)  # default
closed = property(lambda self: object(), lambda self, v: None, lambda self: None)  # default
encoding = property(lambda self: object(), lambda self, v: None, lambda self: None)  # default
errors = property(lambda self: object(), lambda self, v: None, lambda self: None)  # default
line_buffering = property(lambda self: object(), lambda self, v: None, lambda self: None)  # default
name = property(lambda self: object(), lambda self, v: None, lambda self: None)  # default
newlines = property(lambda self: object(), lambda self, v: None, lambda self: None)  # default
_CHUNK_SIZE = property(lambda self: object(), lambda self, v: None, lambda self: None)  # default
_finalizing = property(lambda self: object(), lambda self, v: None, lambda self: None)  # default3.x

#!/usr/bin/env python
# -*- coding:utf-8 -*-####基本操作方法
#默认是只读模式，默认编码方式：utf-8
# f = open('ha.log')
# data = f.read()
# f.close()
# print(data)
#只读，r
# f = open("ha.log","r")
# f.write("asdfs")
# f.close()
#只写，w  ---存在就清空，打开就清空
# f = open("ha1.log","w")
# f.write("Hello world!")
# f.close()
#只写 ，x
# f = open("ha2.log","x")
# f.write("Hello world1!")
# f.close()
#追加  a,不可读
# f = open("ha2.log","a")
# f.write("\nHello world! a mode")
# f.close()### 字节的方式打开
## 默认读取到的都是字节,不用设置编码方式
## 1、 只读，rb
# f = open("ha.log","rb")
# data =f.read()
# f.close()
# print(type(data))
# print(data)
# print(str(data,encoding="utf-8"))#2 只写，wb
# f = open("ha.log","wb")
# f.write(bytes("中国",encoding="utf-8"))
# f.close()### r+ ,w+,x+，a+#r+
# f = open("ha.log",'r+',encoding="utf-8")
# print(f.tell())
# data = f.read()
# print(type(data),data)
# f.write("德国人")
# print(f.tell())
# data = f.read()
# f.close()#w+  先清空，之后写入的可读，写后指针到最后
# f = open("ha.log","w+",encoding="utf-8")
# f.write("何莉莉")
# f.seek(0)  # 指针调到最后
# data = f.read()
# f.close()
# print(data)#  x+  功能类似w+，区别：若文件存在即报错#a +    打开的同时指针到最后
f = open("ha.log","a+",encoding="utf-8")
print(f.tell())
f.write("SB")
print(f.tell())
data = f.read()
print(data)
f.seek(0)
data = f.read()
print(data)
print(type(data))
print(type(f))
f.close()

#!/usr/bin/env python
# -*- coding:utf-8 -*-
def email():import smtplibfrom email.mime.text import MIMETextfrom email.utils import formataddrret = Truetry:msg = MIMEText('邮件内容 test mail 2017-5-27 09:16:14 2017年1月27日11:16:37 \n 2017年1月28日06:47:51', 'plain', 'utf-8')msg['From'] = formataddr(["b2b", 'john@xxx.com'])msg['To'] = formataddr(["hi hi hi  ", 'john2@xxx.com'])msg['Subject'] = "主题2017年5月23日"server = smtplib.SMTP("mail.xxx.com", 25)server.login("john1", "txxx0517")server.sendmail('john1@tasly.com', ['john2@tasly.com', ], msg.as_string())server.quit()except:ret = Falsereturn  ret
i1 =  email()
print(i1)