#!/usr/bin/env python

#-*- coding: utf-8 -*-

def mysql(ns):

    print("mysql host is %s" %ns)

def oracle(ns):

    print("oracle host is %s" %ns)

def redis(ns):

    print("redis host is %s" %ns)

def mogodb(ns):

    print("mogodb host is %s" %ns)

#!/usr/bin/env python

#-*- coding: utf-8 -*-

def node_us(ns):

    print("node1 host is %s" %ns)

def node_eu(ns):

    print("node2 host is %s" %ns)

def node_au(ns):

    print("node3 host is %s" %ns)

#!/usr/bin/env python

#-*- coding: utf-8 -*-

from libs import db

from libs import storage

db1 = db.mogodb("172.0.0.100")

db2 = db.redis("172.0.0.101")

s1 = storage.node_eu("10.10.10.1")

s2 = storage.node_us("10.10.10.3")

# 运行结果

"""

C:\Python35\python3.exe C:/Users/cnblogs/index.py

mogodb host is 172.0.0.100

redis host is 172.0.0.101

node2 host is 10.10.10.1

node1 host is 10.10.10.3

Process finished with exit code 0

"""

# 配置文件里面

settings.py

import os

BASE_DIR = os.path.dirname(os.path.dirname(__file__))   # .

HOME_DIR = os.path.join(BASE_DIR, "home")

BIN_DIR = os.path.join(BASE_DIR, "bin")

LIB_DIR = os.path.join(BASE_DIR, "lib")

LOG_DIR = os.path.join(BASE_DIR, "log")

# 要引用配置的地方

sys.path.append(os.path.dirname(os.path.dirname(__file__)))

from config import settings

settings.HOME_DIR   # 调用"配置文件"

'''百分比进度条'''

import sys

import time

for i in range(101):

    sys.stdout.write('\r') # 换行符

    sys.stdout.write('%s %%|%s' % (int(i / 100 * 100), int(i / 100 * 100) * '■'))

    sys.stdout.flush()    #打印一次清空一次

    time.sleep(0.05)

#!/usr/bin/env python

#-*- coding: utf-8 -*-

import hashlib

def md5_hash(arg):

    ooo = hashlib.md5(bytes('cnblogs', encoding='utf-8'))  # 创建一个加盐的加密对象

    ooo.update(bytes(arg, encoding='utf-8'))                # 加密字符串"123"

    return ooo.hexdigest()

def login(user, pwd):

    with open("db", "r", encoding="utf-8") as f:

        for line in f:

            u, p = line.strip().split(":")

            if u == user and p == md5_hash(pwd):

                return True

def register(user, pwd):

    with open("db", "a", encoding="utf-8") as f:

        temp = user + ":" + md5_hash(pwd)

        f.write(temp)

i = input("1,登录; 2,注册")

if i == "":

    user = input("用户名:")

    pwd = input("密码:")

    r = login(user, pwd)

    if r:

        print("登录成功")

    else:

        print("登录失败")

elif i == "":

    user = input("用户名:")

    pwd = input("密码:")

    register(user, pwd)

#!/usr/bin/env python

# -*- coding: utf-8 -*-

import hashlib

import sys

def md5sum(filename):

    md5 = hashlib.md5()

    with open(filename, 'rb') as f:

        for chunk in iter(lambda: f.read(8192), b''):

            md5.update(chunk)

    return md5.hexdigest()

if __name__ == "__main__":

    file_md5 = md5sum(sys.argv[1])

    print(file_md5)

import random

temp = ""

for i in range(6):

    num = random.randrange(0,4)

    if num == 3 or num == 1:

        rad1 = random.randrange(1,11)

        temp += str(rad1)

    else:

        rad2 = random.randrange(65,91)

        c2 = chr(rad2)

        temp += c2

print(temp)

class Element:

    """An XML element.

    This class is the reference implementation of the Element interface.

    An element's length is its number of subelements.  That means if you

    want to check if an element is truly empty, you should check BOTH

    its length AND its text attribute.

    The element tag, attribute names, and attribute values can be either

    bytes or strings.

    *tag* is the element name.  *attrib* is an optional dictionary containing

    element attributes. *extra* are additional element attributes given as

    keyword arguments.

    Example form:

        <tag attrib>text<child/>...</tag>tail

    """

    当前节点的标签名

    tag = None

    """The element's name."""

    当前节点的属性

    attrib = None

    """Dictionary of the element's attributes."""

    当前节点的内容

    text = None

    """

    Text before first subelement. This is either a string or the value None.

    Note that if there is no text, this attribute may be either

    None or the empty string, depending on the parser.

    """

    tail = None

    """

    Text after this element's end tag, but before the next sibling element's

    start tag.  This is either a string or the value None.  Note that if there

    was no text, this attribute may be either None or an empty string,

    depending on the parser.

    """

    def __init__(self, tag, attrib={}, **extra):

        if not isinstance(attrib, dict):

            raise TypeError("attrib must be dict, not %s" % (

                attrib.__class__.__name__,))

        attrib = attrib.copy()

        attrib.update(extra)

        self.tag = tag

        self.attrib = attrib

        self._children = []

    def __repr__(self):

        return "<%s %r at %#x>" % (self.__class__.__name__, self.tag, id(self))

    def makeelement(self, tag, attrib):

        创建一个新节点

        """Create a new element with the same type.

        *tag* is a string containing the element name.

        *attrib* is a dictionary containing the element attributes.

        Do not call this method, use the SubElement factory function instead.

        """

        return self.__class__(tag, attrib)

    def copy(self):

        """Return copy of current element.

        This creates a shallow copy. Subelements will be shared with the

        original tree.

        """

        elem = self.makeelement(self.tag, self.attrib)

        elem.text = self.text

        elem.tail = self.tail

        elem[:] = self

        return elem

    def __len__(self):

        return len(self._children)

    def __bool__(self):

        warnings.warn(

            "The behavior of this method will change in future versions.  "

            "Use specific 'len(elem)' or 'elem is not None' test instead.",

            FutureWarning, stacklevel=2

            )

        return len(self._children) != 0 # emulate old behaviour, for now

    def __getitem__(self, index):

        return self._children[index]

    def __setitem__(self, index, element):

        # if isinstance(index, slice):

        #     for elt in element:

        #         assert iselement(elt)

        # else:

        #     assert iselement(element)

        self._children[index] = element

    def __delitem__(self, index):

        del self._children[index]

    def append(self, subelement):

        为当前节点追加一个子节点

        """Add *subelement* to the end of this element.

        The new element will appear in document order after the last existing

        subelement (or directly after the text, if it's the first subelement),

        but before the end tag for this element.

        """

        self._assert_is_element(subelement)

        self._children.append(subelement)

    def extend(self, elements):

        为当前节点扩展 n 个子节点

        """Append subelements from a sequence.

        *elements* is a sequence with zero or more elements.

        """

        for element in elements:

            self._assert_is_element(element)

        self._children.extend(elements)

    def insert(self, index, subelement):

        在当前节点的子节点中插入某个节点，即：为当前节点创建子节点，然后插入指定位置

        """Insert *subelement* at position *index*."""

        self._assert_is_element(subelement)

        self._children.insert(index, subelement)

    def _assert_is_element(self, e):

        # Need to refer to the actual Python implementation, not the

        # shadowing C implementation.

        if not isinstance(e, _Element_Py):

            raise TypeError('expected an Element, not %s' % type(e).__name__)

    def remove(self, subelement):

        在当前节点在子节点中删除某个节点

        """Remove matching subelement.

        Unlike the find methods, this method compares elements based on

        identity, NOT ON tag value or contents.  To remove subelements by

        other means, the easiest way is to use a list comprehension to

        select what elements to keep, and then use slice assignment to update

        the parent element.

        ValueError is raised if a matching element could not be found.

        """

        # assert iselement(element)

        self._children.remove(subelement)

    def getchildren(self):

        获取所有的子节点（废弃）

        """(Deprecated) Return all subelements.

        Elements are returned in document order.

        """

        warnings.warn(

            "This method will be removed in future versions.  "

            "Use 'list(elem)' or iteration over elem instead.",

            DeprecationWarning, stacklevel=2

            )

        return self._children

    def find(self, path, namespaces=None):

        获取第一个寻找到的子节点

        """Find first matching element by tag name or path.

        *path* is a string having either an element tag or an XPath,

        *namespaces* is an optional mapping from namespace prefix to full name.

        Return the first matching element, or None if no element was found.

        """

        return ElementPath.find(self, path, namespaces)

    def findtext(self, path, default=None, namespaces=None):

        获取第一个寻找到的子节点的内容

        """Find text for first matching element by tag name or path.

        *path* is a string having either an element tag or an XPath,

        *default* is the value to return if the element was not found,

        *namespaces* is an optional mapping from namespace prefix to full name.

        Return text content of first matching element, or default value if

        none was found.  Note that if an element is found having no text

        content, the empty string is returned.

        """

        return ElementPath.findtext(self, path, default, namespaces)

    def findall(self, path, namespaces=None):

        获取所有的子节点

        """Find all matching subelements by tag name or path.

        *path* is a string having either an element tag or an XPath,

        *namespaces* is an optional mapping from namespace prefix to full name.

        Returns list containing all matching elements in document order.

        """

        return ElementPath.findall(self, path, namespaces)

    def iterfind(self, path, namespaces=None):

        获取所有指定的节点，并创建一个迭代器（可以被for循环）

        """Find all matching subelements by tag name or path.

        *path* is a string having either an element tag or an XPath,

        *namespaces* is an optional mapping from namespace prefix to full name.

        Return an iterable yielding all matching elements in document order.

        """

        return ElementPath.iterfind(self, path, namespaces)

    def clear(self):

        清空节点

        """Reset element.

        This function removes all subelements, clears all attributes, and sets

        the text and tail attributes to None.

        """

        self.attrib.clear()

        self._children = []

        self.text = self.tail = None

    def get(self, key, default=None):

        获取当前节点的属性值

        """Get element attribute.

        Equivalent to attrib.get, but some implementations may handle this a

        bit more efficiently.  *key* is what attribute to look for, and

        *default* is what to return if the attribute was not found.

        Returns a string containing the attribute value, or the default if

        attribute was not found.

        """

        return self.attrib.get(key, default)

    def set(self, key, value):

        为当前节点设置属性值

        """Set element attribute.

        Equivalent to attrib[key] = value, but some implementations may handle

        this a bit more efficiently.  *key* is what attribute to set, and

        *value* is the attribute value to set it to.

        """

        self.attrib[key] = value

    def keys(self):

        获取当前节点的所有属性的 key

        """Get list of attribute names.

        Names are returned in an arbitrary order, just like an ordinary

        Python dict.  Equivalent to attrib.keys()

        """

        return self.attrib.keys()

    def items(self):

        获取当前节点的所有属性值，每个属性都是一个键值对

        """Get element attributes as a sequence.

        The attributes are returned in arbitrary order.  Equivalent to

        attrib.items().

        Return a list of (name, value) tuples.

        """

        return self.attrib.items()

    def iter(self, tag=None):

        在当前节点的子孙中根据节点名称寻找所有指定的节点，并返回一个迭代器（可以被for循环）。

        """Create tree iterator.

        The iterator loops over the element and all subelements in document

        order, returning all elements with a matching tag.

        If the tree structure is modified during iteration, new or removed

        elements may or may not be included.  To get a stable set, use the

        list() function on the iterator, and loop over the resulting list.

        *tag* is what tags to look for (default is to return all elements)

        Return an iterator containing all the matching elements.

        """

        if tag == "*":

            tag = None

        if tag is None or self.tag == tag:

            yield self

        for e in self._children:

            yield from e.iter(tag)

    # compatibility

    def getiterator(self, tag=None):

        # Change for a DeprecationWarning in 1.4

        warnings.warn(

            "This method will be removed in future versions.  "

            "Use 'elem.iter()' or 'list(elem.iter())' instead.",

            PendingDeprecationWarning, stacklevel=2

        )

        return list(self.iter(tag))

    def itertext(self):

        在当前节点的子孙中根据节点名称寻找所有指定的节点的内容，并返回一个迭代器（可以被for循环）。

        """Create text iterator.

        The iterator loops over the element and all subelements in document

        order, returning all inner text.

        """

        tag = self.tag

        if not isinstance(tag, str) and tag is not None:

            return

        if self.text:

            yield self.text

        for e in self:

            yield from e.itertext()

            if e.tail:

                yield e.tail