# spam.py
print('from the spam.py')
money = 1000
def read1():
print('spam模塊：', money)
def read2():
print('spam模塊')
read1()
def change():
global money
money = 0

import module1[, module2[,... moduleN]

# run.py
import spam # from the spam.py
import spam
money = 111111
spam.read1() # 'spam模塊：1000'
spam.change()
print(spam.money) # 0
print(money) # 111111

# run.py
import spam as sm
money = 111111
sm.money
sm.read1() # 'spam模塊：1000'
sm.read2
sm.change()
print(money) # 1000

import spam, time, os
# 推薦使用下述方式
import spam
import time
import os

from modname import name1[, name2[, ... nameN]]

# run.py
from spam import money
from spam import money,read1
money = 10
print(money) # 10

# spam.py
__all__ = ['money', 'read1'] # 只允許導(dǎo)入'money'和'read1'

# run.py
from spam import * # 導(dǎo)入spam.py內(nèi)的所有功能，但會(huì)受限制于__all__
money = 111111
read1() # 'spam模塊：1000'
change()
read1() # 'spam模塊：0'
print(money) # 111111

# m1.py
print('from m1.py')
from m2 import x
y = 'm1'
# m2.py
print('from m2.py')
from m1 import y
x = 'm2'

# m1.py
print('from m1.py')
def func1():
from m2 import x
print(x)
y = 'm1'



# m2.py
print('from m2.py')
def func1():
from m1 import y
print(y)
x = 'm2'

5、# m1.py
print('from m1.py')
y = 'm1'
from m2 import x



# m2.py
print('from m2.py')
x = 'm2'
from m1 import y

dir(sys)
['__displayhook__', '__doc__', '__excepthook__', '__loader__', '__name__',
'__package__', '__stderr__', '__stdin__', '__stdout__',
'_clear_type_cache', '_current_frames', '_debugmallocstats', '_getframe',
'_home', '_mercurial', '_xoptions', 'abiflags', 'api_version', 'argv',
'base_exec_prefix', 'base_prefix', 'builtin_module_names', 'byteorder',
'call_tracing', 'callstats', 'copyright', 'displayhook',
'dont_write_bytecode', 'exc_info', 'excepthook', 'exec_prefix',
'executable', 'exit', 'flags', 'float_info', 'float_repr_style',
'getcheckinterval', 'getdefaultencoding', 'getdlopenflags',
'getfilesystemencoding', 'getobjects', 'getprofile', 'getrecursionlimit',
'getrefcount', 'getsizeof', 'getswitchinterval', 'gettotalrefcount',
'gettrace', 'hash_info', 'hexversion', 'implementation', 'int_info',
'intern', 'maxsize', 'maxunicode', 'meta_path', 'modules', 'path',
'path_hooks', 'path_importer_cache', 'platform', 'prefix', 'ps1',
'setcheckinterval', 'setdlopenflags', 'setprofile', 'setrecursionlimit',
'setswitchinterval', 'settrace', 'stderr', 'stdin', 'stdout',
'thread_info', 'version', 'version_info', 'warnoptions']

a = [1, 2, 3, 4, 5]
import fibo
fib = fibo.fib
print(dir()) # 得到一個(gè)當(dāng)前模塊中定義的屬性列表
# ['__builtins__', '__name__', 'a', 'fib', 'fibo', 'sys']

b = 5 # 建立一個(gè)新的變量 'a'
print(dir())
# ['__annotations__', '__builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__', '__package__', '__spec__', 'a', 'b']
del b # 刪除變量名a
print(dir())
# ['__annotations__', '__builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__', '__package__', '__spec__', 'a']

# test.py
import m1 # 從m1.py文件中導(dǎo)入的,然后會(huì)生成m1模塊的名稱空間
import time
# 刪除m1.py文件,m1模塊的名稱空間仍然存在

time.sleep(10)
import m1 # 不報(bào)錯(cuò),一定不是從文件中獲取了m1模塊,而是從內(nèi)存中獲取的

# time.py
print('from time.py')
# run.py
import time
print(time) #

import sys
for n in sys.path:
print(n)
# C:\PycharmProjects\untitled\venv\Scripts\python.exe C:/PycharmProjects/untitled/hello.py
# C:\PycharmProjects\untitled
# C:\PycharmProjects\untitled
# C:\Python\Python38\python38.zip
# C:\Python\Python38\DLLs
# C:\Python\Python38\lib
# C:\Python\Python38
# C:\PycharmProjects\untitled\venv
# C:\PycharmProjects\untitled\venv\lib\site-packages

# run.py
import sys
sys.path.append(r'C:\PycharmProjects\untitled\day16')
print(sys.path)
import mmm
mmm.f1()

from aa import spam
print(spam.money)

# aaa.py
x = 1
def f1():
print('from f1')
f1()
# run.py
import aaa

# aaa.py
x = 1
def f1():
print('from f1')

if __name__ == '__main__':
f1()

import aaa.bbb.m3
print(aaa.bbb.m3.func3())

from aaa.bbb import m3
print(m3.func3())

from aaa.bbb.m3 import func3
print(func3())

# aaa/.py
from aaa.m1 import func1
from aaa.m2 import func2

from .m1 import func1
from .m2 import func2

__all__ = ["echo", "surround", "reverse"]

ATM/
|-- core/
| |-- src.py # 業(yè)務(wù)核心邏輯代碼
|
|-- api/
| |-- api.py # 接口文件
|
|-- db/
| |-- db_handle.py # 操作數(shù)據(jù)文件
| |-- db.txt # 存儲(chǔ)數(shù)據(jù)文件
|
|-- lib/
| |-- common.py # 共享功能
|
|-- conf/
| |-- settings.py # 配置相關(guān)
|
|-- bin/
| |-- run.py # 程序的啟動(dòng)文件，一般放在項(xiàng)目的根目錄下，因?yàn)樵谶\(yùn)行時(shí)會(huì)默認(rèn)將運(yùn)行文件所在的文件夾作為sys.path的第一個(gè)路徑，這樣就省去了處理環(huán)境變量的步驟
|
|-- log/
| |-- log.log # 日志文件
|
|-- requirements.txt # 存放軟件依賴的外部Python包列表，詳見https://pip.readthedocs.io/en/1.1/requirements.html
|-- README # 項(xiàng)目說明文件

# settings.py
import os
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
DB_PATH = os.path.join(BASE_DIR, 'db', 'db.txt')
LOG_PATH = os.path.join(BASE_DIR, 'log', 'user.log')
# print(DB_PATH)
# print(LOG_PATH)

# common.py
import time
from conf import settings
def logger(msg):
current_time = time.strftime('%Y-%m-%d %X')
with open(settings.LOG_PATH, mode='a', encoding='utf-8') as f:
f.write('%s %s' % (current_time, msg))

# src.py
from conf import settings
from lib import common
def login():
print('登陸')
def register():
print('注冊(cè)')
name = input('username>>: ')
pwd = input('password>>: ')
with open(settings.DB_PATH, mode='a', encoding='utf-8') as f:
f.write('%s:%s\n' % (name, pwd))
# 記錄日志。。。。。。
common.logger('%s注冊(cè)成功' % name)
print('注冊(cè)成功')
def shopping():
print('購(gòu)物')
def pay():
print('支付')
def transfer():
print('轉(zhuǎn)賬')
func_dic = {
'1': login,
'2': register,
'3': shopping,
'4': pay,
'5': transfer,
}
def run():
while True:
print("""
1 登陸
2 注冊(cè)
3 購(gòu)物
4 支付
5 轉(zhuǎn)賬
6 退出
""")
choice = input('>>>: ').strip()
if choice == '6': break
if choice not in func_dic:
print('輸入錯(cuò)誤命令，傻叉')
continue
func_dic[choice]()

# run.py
import sys
import os
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.append(BASE_DIR)
from core import src
if __name__ == '__main__':
src.run()