一、已知有文件test.txt里面的内容如下,查找文件中以1000phone开头的语句,并保存到列表中
1000phone hello python
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mobiletrain html5
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import re
# 读取文件
def read_file(path):
with open(path, "r", encoding="utf-8") as f1:
r1 = f1.readlines()
# print(r1)
return r1
# 查找元素
def findall(readline: list):
new_list = []
for item in readline:
# 去除元素尾的换行符
item = item.strip("\n")
# print(item)
r = re.match(r"^1000phone", item)
# 三目运算符添加元素
new_list.append(item) if r else None
return new_list
if __name__ == '__main__':
path = r"data/test.txt"
all_content = read_file(path)
result = findall(all_content)
print(result)
二、提取用户输入数据中的数值 (数值包括正负数 还包括整数和小数在内) 并求和
例如:“-3.14good87nice19bye” =====> -3.14 + 87 + 19 = 102.86
import re
def get_sum(input_str: str):
r = re.findall(r"-?\d+(?:\.\d+)?", input_str)
print(r)
total = sum(float(number) for number in r)
return total
if __name__ == '__main__':
input_str = input("请输入一串字符串:")
result = get_sum(input_str)
print(result)
THE END
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