Python语言开发相关小技巧

这些小技巧在平常的项目中可能会常常遇到，将这些小技巧记录下来，以便以后再学习。

qqq = '12345678912121212121'
print(type(qqq))
print('%r'% qqq)

hex(16) -----> 0x10

int(‘0x10’, 16) ==> 16
示例实现方法
addr = int('0x'+str(int(value)), 16)

eeee = r'd+,d+,d+'
result = re.match(eeee, '0,0,0')

匹配逻辑表达式：（1，1，1）（-1，1.7,1）
def isMyStr(s):
    p = re.compile('^(((-?d+)(.d+)?),){2}((-?d+)(.d+)?)$')
    if p.match(s):
        return True
    else:
        return False

将字典转化为字符串
dict = {
     "xxx": "1",
     "yyy": "2",
     "zzz": "3"
 }
json_str = json.dumps(dict, ensure_ascii=False)
print(json_str)

json_str = '{"xxx": "1","yyy": "2","zzz": "3"}'
dict = json.loads(json_str)
print(type(dict))
print(dict)

将json信息写进文件
参考5.1示例字典

path = "文件路径"
if os.path.exists(path) == False:
   with open(path, 'w+', encoding='utf-8') as f:
       json.dump(dict, f)

将读取文件的json信息

path = "文件路径"
if os.path.exists(path) == False:
   with open(path, 'r', encoding='utf-8') as f:
       dict_1 = json.load(f)

pathName = os.path.basename(path)

str 转 byte
byte = string.encode('utf-8')

byte 转 str
string = byte.decode('utf-8')

aaa = '123'

b = aaa.encode('utf-8')
print(b)

bbb = b.decode('utf-8')
print(bbb)

key = Fernet.generate_key()
key = b'AG1ePgaWwlJ3TDyAj5yZOMh20WRoGiya349VQkjI-Gg='

cipher = Fernet(key)
text = b'5555'
#进行加密
encrypted_text = cipher.encrypt(text)
print(encrypted_text)
#进行解密
decrypted_text = cipher.decrypt(encrypted_text)
print(decrypted_text)

def get_mainboard_info():
    """
    主板序列号
    :return:主板号 list   list[0] 即为主板号
    """
    s = wmi.WMI()
    mainboard = []
    for board_id in s.Win32_baseBoard():
        mainboard.append(board_id.SerialNumber.strip().strip('.'))
    return mainboard