额，上边的例子是不是有点复杂了，拿我们项目里边的实例为例，就是判断id是否存在，如果存在则更新，如果不存在则创建
object, created = Table.objects.update_or_create( id=postdata.get('id'), defaults=postdata )update_or_create方法返回结果为一个元组(object, created)，object为新建或者更新的对象，created为一个布尔值，表示是新建还是更新，True为新建
密码加密对于密码加密，我们知道加密算法有很多，究竟哪种适合我们呢？
看一下我们的需求，存储的时候要加密存储，但也要能对加密后的数据进行解密以获取原始密码，那么就要求加密算法既支持加密，也支持解密，对于md5这种只支持加密的单向算法就不能选择了，在支持加解密的算法中应用最为广泛的当属RSA了，我们最终也选择了RSA，其实单单对于这个场景来说用3DES之类的对称加密就够了，速度也会快很多，但是考虑到系统里边有其他的加密需求选择RSA能满足更多情景。
RSA加密算法非常复杂，感兴趣的可以查询专业资料，RSA需要一对秘钥称为公钥和私钥，公钥可以对字符串进行加密生成加密字符串，拿私钥可以将加密字符串还原。
python3中RSA的使用生成RSA秘钥对代码
from Cryptodome.PublicKey import RSA def create_rsa_key(): '''生成RSA秘钥对''' try: # 选择秘钥位数，位数越高越安全，同时加密速度也越慢 key = RSA.generate(2048) encrypted_key = key.exportKey(pkcs=8) public_key = key.publickey().exportKey().decode('utf-8') private_key = encrypted_key.decode('utf-8') return {'state': 1, 'message': {'public_key': public_key, 'private_key': private_key}} except Exception as err: return {'state': 0, 'message': str(err)} if __name__ == '__main__': print(create_rsa_key())执行脚本生成RSA秘钥对，将RSA秘钥对配置在加解密的代码中
RSA加密解密代码
import binascii from Cryptodome.PublicKey import RSA from Cryptodome.Cipher import PKCS1_v1_5 class RsaCrypto(): '''RSA 加解密''' def __init__(self): self.private_key = '''-----BEGIN PRIVATE KEY----- MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQDLetN9MfsVWZj2 K+i1vPQqeDKb8Fe52pHKvRtQggTF+x3YRCyk7UNQ27VupohM8t+Qzi2Zm3GnZY5X H7W8UGLnI1X1ykpWOWVueP3KCA7DCtswDp5hkJgHzPPZC/DlFh0uCpAmUkgHP7WU XRZoR9mmcVOdWN9c+NWS0JA6cwHSI+J78Edb1lfef5YOwseL2GiOmBiJ7THYfjrw FwGQaZVjhsp3Pkt7Yt/Huc5NU234wA9j+TFFnubpOrE9mFT8qCkhFhWIEcNsuTqD DDI9BX0lLaEEn+vg9cnEZ97VgdQQG2D6Ozw4Gldpfoq1XB6BqXg+YsCvyD/h/4QD LpejZy/VAgMBAAECggEADJkoj6omNevb459Tri+VHS1fUiEEXXZ3QQqKWWa4wu/0 U2030mek8P8EHGYP2avOmcRE4IDWUvCfv9cvxQljxj8oKwABBZZSKGUyBBiRnr6E /v8OC/5hhgIeNZm0ADW+osN2qgNoKu1lNwVjG3EaEbXB4TkdGJWI1lPhdNelYjby 7/4vnXO7yplSFlDLiqjmEV9Vva3Jf3N3vf92ZfUJg6NHklYDlP+L4unNtS++HKtv C3TWSz0esVrK67t4Vut+RdKrSQzzWkPAqNwktUavQq6Nb+KMrf9tsQujPZaXkEUn LUwtVNwhT3BiyPswHN1ycjlP3lN391rnawDQc751dQKBgQDZSFBq1JaGm4zK2YHm BbxCJ++6l1Qmu9yhk/zic1M/oGoFRdzkeWrYsxhLupp+4PjcCPEiZqivSeJXsFVO diSjWsBkfO51HRuEzRE2Z/tiTRzJsGAcrBsWwBYNZR/PADG7MEYhIYH0p6Jp3jrq pNs0f5Gz8XToPi2TQXmRyAltFwKBgQDvvOFlJFfx1ld2wLuZ0w1yMpUoyFYCWSh+ ylREFETod8ufbQxRzvvSA3gFO+xwYZoA+Wq/TyGrfVnN9m4R1goPsQjsuUYQeAIi MBKmG5znTAmu8dQ5wLKtb10CV0MuFGOSv8xvlccKepY7IDtxOaO410o4PFEjAziU 90b8RiRV8wKBgHDsUD71NTXH6agS2pu9J1YKg2Cp/SYURFoFG0xlO0K6D9+lq2Ni ZtEwYtQYqup96VgRnaCPUeOntmZ0UiFw7SGorIyNETD0a7TdDrED4XX5NZjsfUbp ezqbodpcT+e45h+uuwPE8lFAPfxfbqc7/mCOXB70whlhFzaMtK27FIsJAoGAVtTJ qnF8bPpeWYO7Lx7TOu55Ofk9tcIHOc0csj/JKY3iMY80rBjU+p8JBJRMsfOX7Qxp jnshzdQsB75e5ZTptf9AJUWBzAs7cpiI2KMdtGTFCRlL7dMOpGS2gleK3JDD8+4G JNBR9EisSyQEg6EF3LgViMLH/G95OfNKQatCE+MCgYEAhRIuEMaL2idD9NKOVdgC fuSbiP5G69IBVD4uoDYFPQJjxqVOg3pORa8+cJTe+ZFaCkTGV3112eM5Vtm4Vd9Q pOh7VgJP1l3puZnUoSWGoWansx6aKok5FwuUrZWPjqr/Zrre8XXJyaiR520tuf0i StMfNAsijJgi2pq2PTMovhE= -----END PRIVATE KEY-----''' self.public_key = '''-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAy3rTfTH7FVmY9ivotbz0 Kngym/BXudqRyr0bUIIExfsd2EQspO1DUNu1bqaITPLfkM4tmZtxp2WOVx+1vFBi 5yNV9cpKVjllbnj9yggOwwrbMA6eYZCYB8zz2Qvw5RYdLgqQJlJIBz+1lF0WaEfZ pnFTnVjfXPjVktCQOnMB0iPie/BHW9ZX3n+WDsLHi9hojpgYie0x2H468BcBkGmV Y4bKdz5Le2Lfx7nOTVNt+MAPY/kxRZ7m6TqxPZhU/KgpIRYViBHDbLk6gwwyPQV9 JS2hBJ/r4PXJxGfe1YHUEBtg+js8OBpXaX6KtVwegal4PmLAr8g/4f+EAy6Xo2cv 1QIDAQAB -----END PUBLIC KEY-----''' def encrypt(self, plaintext): '''加密方法''' try: recipient_key = RSA.import_key(self.public_key) cipher_rsa = PKCS1_v1_5.new(recipient_key) en_data = cipher_rsa.encrypt(plaintext.encode('utf-8')) hex_data = binascii.hexlify(en_data).decode('utf-8') return {'state': 1, 'message': hex_data} except Exception as err: return {'state': 0, 'message': str(err)} def decrypt(self, hex_data): '''解密方法''' try: private_key = RSA.import_key(self.private_key) cipher_rsa = PKCS1_v1_5.new(private_key) en_data = binascii.unhexlify(hex_data.encode('utf-8')) data = cipher_rsa.decrypt(en_data, None).decode('utf-8') return {'state': 1, 'message': data} except Exception as err: return {'state': 0, 'message': str(err)} if __name__ == '__main__': print(RsaCrypto().encrypt())