输入a=[1,4,3,1] b=["apple","ban","nam","ban"] 输出 ["apple","ban","ban","ban","ban","nam","nam","nam","ban"] python 写
时间: 2024-05-03 13:16:03 浏览: 42
可以通过以下代码实现所需功能:
```python
a = [1, 4, 3, 1]
b = ["apple", "ban", "nam", "ban"]
result = []
for i in range(len(a)):
for j in range(a[i]):
result.append(b[i])
print(result)
```
输出结果为:["apple","ban","ban","ban","ban","nam","nam","nam","ban"]
相关问题
update content nam=‘40'hq’ whrer id =2 报错
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x9ecparameters sm2ecparameters = gmnamedcurves.getbyname(constant.crypto_nam
x9ecparameters sm2ecparameters = gmnamedcurves.getbyname(constant.crypto_nam 是一段Java代码。该代码通过调用gmnamedcurves.getbyname方法,传入参数constant.crypto_nam来获取SM2加密算法所使用的椭圆曲线的参数。
椭圆曲线密码算法(Elliptic Curve Cryptography,简称ECC)是一种主要用于公钥加密和数字签名的密码学算法。SM2是一种国密算法,即中国自主研发的ECC算法。在SM2算法中,密钥的长度是256位,安全性较高。
在Java中,x9ecparameters和sm2ecparameters是两个变量,其中x9ecparameters是X9ECParameters类型的变量,sm2ecparameters是该类型的实例化对象。X9ECParameters类是Java密码学库中的一个类,它包含了椭圆曲线密码算法的参数,如素数,基点坐标等。
通过调用gmnamedcurves.getbyname方法,传入参数constant.crypto_nam,我们可以获取SM2算法所使用的椭圆曲线的参数,即得到一个符合SM2算法标准的参数集合,用于进行SM2加密操作。这个参数集合可以提供给加密和解密操作使用,以保证数据的安全性和完整性。