Question

s_headers=[]
headers=['DRIVER’S NAME', 'LICENSE', 'PH NUMBER', 'DOB', 'HIRE DAY']
for head in headers:
    if isinstance(head, float):
        s_headers.append(str(int(head)))
    else:
        s_headers.append(head)
print(s_headers)

输出：-

[“驾驶员姓名”，“许可”，“ PH号码”，“ DOB”，“ HIRE DAY”]

当我尝试使用此代码减少代码时，

s_headers.append(str(int(head) if (isinstance(head, float)) else head) for head in headers)
print(s_headers)

输出：-

[at 0x7f2aeec50780>]

Answer 1

您似乎需要列表理解

例如：

s_headers=[]
headers=['DRIVER’S NAME', 'LICENSE', 'PH NUMBER', 'DOB', 'HIRE DAY']

s_headers = [str(int(head)) if isinstance(head, float) else head  for head in headers]
print(s_headers)

Answer 2

行

s_headers.append(str(int(head) if (isinstance(head, float)) else head) for head in headers)

创建一个生成器表达式，该表达式在需要成员之前不会求值。您可以进行列表理解：

s_headers = [str(int(head) if (isinstance(head, float)) else head) for head in headers]
print(s_headers)

或将结果强制转换（生成器到列表中）：

s_headers.extend(list(str(int(head) if (isinstance(head, float)) else head) for head in headers))

如果/否则，则无法运行Python

2 个答案: