Pythonの14日目の努力--関数と反復器の練習
6324 ワード
01内容レビュー反復可能オブジェクト: 反復の実在値 を更新することができる.の内部には str list tuple dict set range 利点:操作方法が多く、操作が柔軟で、直感的な の欠点:メモリの消費量.
反復器: は反復のツール(データ構造)を更新することができる. 内部に .ファイルハンドル の利点:メモリの節約.不活性機構 欠点:直感的ではなく、速度が相対的に遅く、操作方法が単一で、1本の道が黒くなる.
出力をフォーマットします. 関数名の適用.
02練習
'__iter__'
'__iter__' '__next__'
02練習
# 1. ：
# ：
#
# def func1():
# print('in func1' )
#
# def func2():
# print('in func2' )
#
# ret = func1
# ret()
# ret1 = func2
# ret1()
# ret2 = ret
# ret3 = ret2
# ret2()
# ret3()
# ：
# in func1
# in func2
# in func1
# in func1
# ：
#
# def func1():
# print('in func1' )
#
# def func2():
# print('in func2' )
#
# def func3(x, y):
# x()
#
# print('in func3' )
#
# y()
#
# print(111)
# func3(func2, func1)
# print(222)
# ：
# 111
# in func2
# in func3
# in func1
# 222
# （ ）：
#
# def func1():
# print('in func1' )
#
# def func2(x):
# print('in func2' )
# return x
#
# def func3(y):
# print('in func3' )
# return y
#
# ret = func2(func1)
# ret()
# ret2 = func3(func2)
# ret3 = ret2(func1)
# ret3()
#
# ：
# in func2
# in func1
# in func3
# in func2
# in func1
# 2. ：
#
# def func(arg):
# return arg.replace(' ', '***')
#
#
# def run():
# msg = "Alex "
# result = func(msg)
# print(result)
#
#
# run()
# Alex ***
# def func(arg):
# return arg.replace(' ', '***')
#
#
# def run():
# msg = "Alex "
# result = func(msg)
# print(result)
#
# data = run()
# print(data)
# Alex ***
# None
# 3. ：
#
# DATA_LIST = []
#
#
# def func(arg):
# return DATA_LIST.insert(0, arg)
#
#
# data = func(' ')
# print(data)
# print(DATA_LIST)
# None
# [' ']
# 4. ：
#
# def func():
# print(' ')
# return ' '
#
#
# func_list = [func, func, func]
#
# for item in func_list:
# val = item()
# print(val)
#
#
#
#
#
#
# 5. ：
#
# def func():
# print(' ')
# return ' '
#
#
# func_list = [func, func, func]
#
# for i in range(len(func_list)):
# val = func_list[i]()
# print(val)
#
#
#
#
#
#
# 6. ：
# def func():
# return ' '
#
#
# def bar():
# return ' '
#
#
# def base(a1, a2):
# return a1() + a2()
#
#
# result = base(func, bar)
# print(result)
#
# 7. ：
# for item in range(10):
# print(item)
#
# print(item)
# 0
# 1
# 2
# 3
# 4
# 5
# 6
# 7
# 8
# 9
# 9
# 8. ：
# def func():
# for item in range(10):
# pass
# print(item)
# func()
# 9
# 9. ：
# item = ' '
# def func():
# item = 'alex'
# def inner():
# print(item)
# for item in range(10):
# pass
# inner()
# func()
# 9
# 10. ：
# l1 = []
# def func(args):
# l1.append(args)
# return l1
# print(func(1))
# print(func(2))
# print(func(3))
# [1]
# [1,2]
# [1,2,3]
# 11. ：
# name = ' '
# def func():
# global name
# name = ' '
# print(name)
# func()
# print(name)
#
#
# 12. ：
# name = ' '
# def func():
# print(name)
# func()
#
# 13. ：
# name = ' '
# def func():
# print(name)
# name = 'alex'
# func()
#
# 14. ：
# def func():
# count = 1
# def inner():
# nonlocal count
# count += 1
# print(count)
# print(count)
# inner()
# print(count)
# func()
# 1
# 2
# 2
# 15. ：
# def extendList(val,list=[]):
# list.append(val)
# return list
#
# list1 = extendList(10)
# list2 = extendList(123,[])
# list3 = extendList('a')
#
# print('list1=%s'%list1)
# print('list2=%s'%list2)
# print('list3=%s'%list3)
# list1=[10,'a']
# list1=[123]
# list1=[10,'a']
# 16. ：
# def extendList(val,list=[]):
# list.append(val)
# return list
# print('list1=%s'% extendList(10))
# print('list2=%s'% extendList(123,[]))
# print('list3=%s'% extendList('a'))
# list1=[10]
# list1=[123]
# list1=[10,'a']
# 17. ： while for
# l1 = [1,2,3,4,5,6,7,8,9,10]
#
# obj = iter(l1)
# while 1:
# try:
# print(next(obj))
# except StopIteration:
# break
# 18. ， n ， {‘max’: ,’min’: }
# :min_max(2,5,7,8,4) :{‘max’:8,’min’:2}( max(),min() )
# dic = {}
# def min_max(*args):
# dic['max'] = max(args)
# dic['min'] = min(args)
# print(dic)
# min_max(2,5,7,8,4)
# 19. ， n， n
# :cal(7) 7654321
# def factorial(num):
# result = 1
# while 1:
# if num > 0:
# result = result * num
# else:
# break
# num = num - 1
# return result
# print(factorial(3))
# def factorial(num):
# result = 1
# for i in range(num,0,-1):
# result = result * i
# return result
# print(factorial(3))
# 20. ， ， 52 ， ( )
# ：[(‘ ’，2),(‘ ’，2), …(‘ ’，‘A’)]
# l1 = []
# def poker():
# tu1 = ()
# tu2 = ()
# tu3 = ()
# tu4 = ()
# s1 = 'JQKA'
# for i in range(2,11):
# tu1 = (' ',i)
# tu2 = (' ',i)
# tu3 = (' ',i)
# tu4 = (' ',i)
# l1.append(tu1)
# l1.append(tu2)
# l1.append(tu3)
# l1.append(tu4)
# for j in s1:
# tu1 = (' ', j)
# tu2 = (' ', j)
# tu3 = (' ', j)
# tu4 = (' ', j)
# l1.append(tu1)
# l1.append(tu2)
# l1.append(tu3)
# l1.append(tu4)
# poker()
# print(l1)
# def poker():
# num = list(range(2, 11))
# num.extend('JQKA')
# color = (' ', ' ', ' ', ' ')
# card = [(m, n) for m in color for n in num]
# return card
# print(poker())