收到错误：列表分配索引超出范围

Question

我在以下代码中得到的错误列表分配索引超出范围：

n=input("How many numbers?\n")
print "Enter ",n," numbers..."
a=[]
for i in range(0,n):
    a[i]=input()

elem=input("Enter the element to be searched: ")

for i in range(0,n):
    if a[i]==elem:
        flag=1
        break

if flag==1:
    print "Item is present in the list"
else:
    print "Item is not present in the list"

Answer 1

使用 int 添加一些类型安全性，使用追加和中的运算符：

n = input("How many numbers?\n")
n = int(n)
print "Enter ", n, " numbers..."
a = []
for i in range(n):
    x = input()
    a.append(x)

elem = input("Enter the element to be searched: ")

if elem in a:
    print "Item is present in the list"
else:
    print "Item is not present in the list"

Answer 2

您在没有声明的情况下设置列表索引。参见：

a=[]

然后你想要访问某个索引？你正在读取带有输入的字符串，在使用之前将其转换。事情看起来像：

n = int(n)
a= []*n

Answer 3

像这样使用，

n=input("How many numbers?\n")
print "Enter ",n," numbers..."
# assigning with n times zero values which will get overwritten when you input values.
a=[0]*n
for i in range(0,n):
    a[i]=input()

elem=input("Enter the element to be searched: ")

for i in range(0,n):
    if a[i]==elem:
        flag=1
        break

if flag==1:
    print "Item is present in the list"
else:
    print "Item is not present in the list"