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83 lines
2.2 KiB
83 lines
2.2 KiB
# _*_ coding: utf-8 _*_
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# @Time : 2021/5/27 14:58
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# @File : funcs.py
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# @Software: PyCharm
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"""
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此文件存放一些公用的工具函数
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"""
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import datetime
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import random
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from random import shuffle
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from django_redis import get_redis_connection
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from utils.custom import MyCustomError
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def generate_random_str(randomlength=16):
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"""
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生成一个指定长度的随机字符串
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"""
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random_str = ''
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base_str = 'abcdefghigklmnopqrstuvwxyz0123456789'
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length = len(base_str) - 1
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for i in range(randomlength):
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random_str += base_str[random.randint(0, length)]
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return random_str
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def generate_random_str_16_system(randomlength=16):
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"""
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生成一个指定长度的随机字符串, 这个字符串看起来像16进制的
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"""
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random_str = ''
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base_str = '0123456789abcdef'
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length = len(base_str) - 1
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for i in range(randomlength):
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random_str += base_str[random.randint(0, length)]
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return random_str
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# 获取乱序字符串
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def shuffle_str(s):
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# 将字符串转换成列表
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str_list = list(s)
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# 调用random模块的shuffle函数打乱列表
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shuffle(str_list)
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# 将列表转字符串
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return ''.join(str_list)
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# 获取原来字符串在新字符串中的位置
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def str_map(origin, new_str):
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result_str = []
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new_str_list = list(new_str)
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for each in origin:
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index = new_str_list.index(each)
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result_str.append(index)
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# 生成轨迹
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track = random.sample(range(0, len(result_str)), len(result_str))
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return result_str, track
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# 定义尝试的日期格式列表
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sys_formats = ["%Y-%m-%d", "%Y/%m/%d", "%Y年%m月%d日", "%Y%m%d"]
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def parse_date(date_string, formats=sys_formats):
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"""
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尝试按照提供的格式解析日期字符串， 返回日期date
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@param date_string: 日期字符串
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@param formats: 尝试格式
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@return:
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"""
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if not isinstance(formats, list):
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if not isinstance(formats, str) or formats not in sys_formats:
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raise MyCustomError("日期格式不支持")
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formats = [formats, ]
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for fmt in formats:
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try:
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return datetime.datetime.strptime(date_string, fmt).date()
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except ValueError:
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pass
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raise MyCustomError("无法解析日期字符串")
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