一、定义一个生成器函数，
1、生成1-10使用next(generator)方法获取1-10
2、使用for循环获取
def data(): for i in range(1,11): yield i data =data() print(next(data)) for i in data: print(i) 1 2 3 4 5 6 7 8 9
二、模拟range的功能，自己建立一个range:MyRange
class MyIterator: def __init__(self, start=0, stop=0, step=0): self.start = start self.stop = stop self.step = step def __iter__(self): return self def __next__(self): data = self.start if self.start < self.stop: self.start += self.step return data else: raise StopIteration for i in MyIterator(1, 10, 3): print(i) 1 4 7
三、re中函数的使用
match
fullmatch
search
findall
finditer
split
sub
subn
complie
str_var = 'abc' data = 'aabcbcabca' obj_match = re.match(str_var, data) print(obj_match) # fullmatch obj_full = re.fullmatch(str_var, data) print(obj_full) # search obj_sea = re.search(str_var, data) print(obj_sea) # findall obj_fin = re.findall(str_var, data) print(obj_fin) # finditer obj_findier = re.finditer(str_var, data) print(list(obj_findier)) # split str_data = "西安培华,西安鸥鹏,西京" pattern = "," result = re.split(pattern, str_data, 1) print(result) # sub str_data = "西安培华,西安鸥鹏,西京" pattern = "," result = re.sub(",", "|", str_data, 1) print(result) # subn result = re.subn(",", "|", str_data) print(result) # complie # 获取编译对象的函数 pattern = "abc" str_data = "abcabcabc" compile_obj = re.compile(pattern) print(compile_obj) print(compile_obj.match(str_data)) print(compile_obj.search(str_data)) print(compile_obj.findall(str_data)) # 输出 None None <re.Match object; span=(1, 4), match='abc'> ['abc', 'abc'] [<re.Match object; span=(1, 4), match='abc'>, <re.Match object; span=(6, 9), match='abc'>] ['西安培华', '西安鸥鹏,西京'] 西安培华|西安鸥鹏,西京 ('西安培华|西安鸥鹏|西京', 2) re.compile('abc') <re.Match object; span=(0, 3), match='abc'> <re.Match object; span=(0, 3), match='abc'> ['abc', 'abc', 'abc']
