　　今天是2017-05-03，这里记录一些python的基础使用方法。世上存在着不能流泪的悲哀，这种悲哀无法向人解释，即使解释人家也不会理解。它永远一成不变，如无风夜晚的雪花静静沉积在心底。

Python的基础学习

一、python中函数作为参数

import math

def add(x, y, f):

    return f(x) + f(y)

print(add(25, 9, math.sqrt)) # 8.0

二、python引用自定义模块

在同目录下面定义两个文件huhx.py和huhx5.py。其中huhx.py作为一个模块供huhx5.py使用。

huhx.py文件内容如下：

# defined a module

username = "Linux"

def sayMyName():

    print("My name is ", username)

huhx5.py文件内容如下：

import huhx

huhx.sayMyName();

打印效果如下：

python基础---->python的使用(三)-LMLPHP

三、python文件的读写

# 文件的写，这一般用于写比较短的字符

with open('../file/huhx.xml', 'w', encoding='utf-8') as f:

    f.write('您好, huhx!')

# 文件的读，这一般用于读取比较短的字符

with open('../file/huhx.xml', 'r', encoding='utf-8') as f:

    print(f.read())

四、python中stmtp简单发送邮箱

import smtplib

from email.header import Header

from email.mime.text import MIMEText

from email.utils import parseaddr, formataddr

def _format_addr(s):

    name, addr = parseaddr(s)

    return formataddr((Header(name, 'utf-8').encode(), addr))

from_addr = '****'

password = '*****'

to_addr = '******'

smtp_server = 'smtpcom.263xmail.com'

msg = MIMEText('hello, my name is huhx.', 'plain', 'utf-8')

msg['From'] = _format_addr('huhx <%s>' % from_addr)

msg['To'] = _format_addr('linux <%s>' % to_addr)

msg['Subject'] = Header('subject info', 'utf-8').encode()

server = smtplib.SMTP(smtp_server, 465)

server.set_debuglevel(1)

server.login(from_addr, password)

server.sendmail(from_addr, [to_addr], msg.as_string())

server.quit()

如果发送的是html邮件，则将上述的msg改为如下：

msg = MIMEText('<html><body><h1>Hello</h1>' +

               '<p>send by <a href="http://www.python.org">Python</a>...</p>' +

               '</body></html>', 'html', 'utf-8')

如果需要发送附件：

import smtplib

from email import encoders

from email.header import Header

from email.mime.base import MIMEBase

from email.mime.multipart import MIMEMultipart

from email.mime.text import MIMEText

from email.utils import parseaddr, formataddr

def _format_addr(s):

    name, addr = parseaddr(s)

    return formataddr((Header(name, 'utf-8').encode(), addr))

from_addr = '****'

password = '*****'

to_addr = '***@qq.com'

smtp_server = 'smtpcom.263xmail.com'

# 邮件对象:

msg = MIMEMultipart()

msg['From'] = _format_addr('hello <%s>' % from_addr)

msg['To'] = _format_addr('huhx <%s>' % to_addr)

msg['Subject'] = Header('subject info', 'utf-8').encode()

# 邮件正文是MIMEText:

msg.attach(MIMEText('send with file...', 'plain', 'utf-8'))

# 添加附件就是加上一个MIMEBase，从本地读取一个图片:

with open('huhx.png', 'rb') as f:

    # 设置附件的MIME和文件名，这里是png类型:

    mime = MIMEBase('image', 'png', filename='test.png')

    # 加上必要的头信息:

    mime.add_header('Content-Disposition', 'attachment', filename='test.png')

    mime.add_header('Content-ID', '<0>')

    mime.add_header('X-Attachment-Id', '')

    # 把附件的内容读进来:

    mime.set_payload(f.read())

    # 用Base64编码:

    encoders.encode_base64(mime)

    # 添加到MIMEMultipart:

    msg.attach(mime)

server = smtplib.SMTP(smtp_server, 465)

server.set_debuglevel(1)

server.login(from_addr, password)

server.sendmail(from_addr, [to_addr], msg.as_string())

server.quit()

五、python中简单的html解析

from html.parser import HTMLParser

class MyHTMLParser(HTMLParser):

    def handle_starttag(self, tag, attrs):

        print("Encountered a start tag:", tag)

    def handle_endtag(self, tag):

        print("Encountered an end tag :", tag)

    def handle_data(self, data):

        print("Encountered some data  :", data)

parser = MyHTMLParser()

parser.feed('<html><head><title>Test</title></head>'

            '<body><h1>Parse me!</h1></body></html>')

运行的结果如下

Encountered a start tag: html

Encountered a start tag: head

Encountered a start tag: title

Encountered some data  : Test

Encountered an end tag : title

Encountered an end tag : head

Encountered a start tag: body

Encountered a start tag: h1

Encountered some data  : Parse me!

Encountered an end tag : h1

Encountered an end tag : body

Encountered an end tag : html

六、python的文件解压缩

import tarfile

def tarFile(

    tar = tarfile.open("sample.tar", "w")):

    for name in ["all_url.csv", "download_url.csv", "update.csv"]:

        tar.add(name)

    tar.close()

def untarFile():

    tar = tarfile.open("sample.tar", "r:tar")

    for tarinfo in tar:

        print(tarinfo.name, 'is', tarinfo.size)

if __name__ == '__main__':

    tarFile()

    untarFile()

运行的结果如下：

all_url.csv is

download_url.csv is

update.csv is

ython的

python基础---->python的使用(三)