Python代码可在单个遍历中将空格移到字符串的开头
我们有一个字符串，我们的目标是将字符串中的所有空格移到前面。假设一个字符串包含四个空格，那么我们必须将这四个空格移动到每个字符的前面。在进行编码之前，让我们看一些示例测试案例。
Input: string = "nhooo.com " Output: "nhooo" -> output will be without quotes
Input: string = "我是python程序员。" Output: "Iamapythonprogrammer." -> output will be without quotes
让我们按照以下步骤实现我们的目标。
算法
1. Initialise the string. 2. Find out all the characters which are not spaces and store them in a variable. 3. Find out the no. of spaces by count method of the string. 4. Multiply a space by no. of spaces and store it in a variable. 5. Append all the characters to the previous variable. 6. Print the result at the end.
让我们尝试实现上述算法。
示例
## initializing the string
string = "nhooo.com "
## finding all character exclusing spaces
chars = [char for char in string if char != " "]
## getting number of spaces using count method
spaces_count = string.count(' ')
## multiplying the space with spaces_count to get all the spaces at front of the ne
w_string
new_string = " " * spaces_count
## appending characters to the new_string
new_string += "".join(chars)
## priting the new_string
print(new_string)输出结果
如果运行上述程序，将得到以下输出。
nhooo
让我们用不同的输入执行程序。
示例
## initializing the string
string = "我是python程序员。"
## finding all character exclusing spaces
chars = [char for char in string if char != " "]
## getting number of spaces using count method
spaces_count = string.count(' ')
## multiplying the space with spaces_count to get all the spaces at front of the ne
w_string
new_string = " " * spaces_count
## appending characters to the new_string
new_string += "".join(chars)
## priting the new_string
print(new_string)输出结果
如果运行上述程序，将得到以下输出。
Iamapythonprogrammer.
结论
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