Python 中檢查字串是否包含所有相同字元的方法

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Python 是一種非常常用的程式語言，用於各種目的，例如 Web 開發、資料科學、機器學習以及執行許多不同的自動化流程。在本文中，我們將學習在 Python 中檢查字串是否包含所有相同字元的不同方法。

Python 中檢查字串是否包含所有相同字元的不同方法

集合函式

集合將幫助我們檢查程式中給定的輸入字串之間的相似性。這是一種非常簡單的方法，並且在所有情況下輸出都將顯示為 True 或 False。讓我們看一下語法，並透過一個示例來更好地理解它：-

示例

def similarity_in_between_characters(input): # The string is given as input to the function similarity_in_between_characters
   return len(set(input)) == 1 # The length should be the same
# Example
print(similarity_in_between_characters("ffffff"))  # Case - 1
print(similarity_in_between_characters("asffcde")) # Case - 2

輸出

上面示例的輸出如下：-

True # All the characters are same in the first case
False # There are different characters present in the second case

計數器類

在這種方法中，我們將使用 collections 模組來計算唯一字元的數量，如果計數超過 1 個字元，則輸出將顯示為 false。讓我們看一下語法，並透過一個示例來更好地理解它：-

示例

from collections import Counter # Do not forget to import the collections library or else error might occur

def similarity_in_between_characters(input):# The string is given as input to the function similarity_in_between_characters
   char_count = Counter(input) # With the help of the counter class, all the characters in the string will be counted
   return len(char_count) == 1 
# Example
print(similarity_in_between_characters("ffffff")) # Case-1 
print(similarity_in_between_characters("asddfc")) # Case-2 

輸出

上面示例的輸出如下：-

True # All the characters are same in the first case
False # There are different characters present in the second case

迴圈方法

在這種方法中，每個字元將逐個與其他字元進行比較，就像迴圈形式一樣，如果發現任何差異，則輸出將顯示為 false。讓我們看一下語法，並透過一個示例來更好地理解它：-

示例

def similarity_in_between_characters(input):# The string is given as input to the function similarity_in_between_characters
   first_char = input[0] # The first character is set as a reference character 
   return all(char == first_char for char in input) # With the help of for loop each charatcer in the string is compared with the first character
# Example
print(similarity_in_between_characters("fffff")) # Case-1 
print(similarity_in_between_characters("fdsas")) # Case-2

輸出

上面示例的輸出如下：-

True # All the characters are same in the first case
False # There are different characters present in the second case

計數函式

在這種方法中，藉助 count 函式，對字串中出現的所有不同字元進行計數。讓我們看一下語法，並透過一個示例來更好地理解它：-

示例

def similarity_in_between_characters(input):# The string is given as input to the function similarity_in_between_characters
   first_char = input[0] # The count of the different characters present in the string is done
   return input.count(first_char) == len(input)
# Example
print(similarity_in_between_characters("fffff")) # Case-1 
print(similarity_in_between_characters("asyew")) # Case-2 

輸出

上面示例的輸出如下：-

True # All the characters are same in the first case
False # There are different characters present in the second case

all 函式

藉助 all 函式，我們檢查給定輸入字串中的所有元素是否都可以被檢查，然後藉助 set 函式，我們檢查字元的相似性。讓我們看一下語法，並透過一個示例來更好地理解它：-

示例

def similarity_in_between_characters(input):# The string is given as input to the function similarity_in_between_characters
   return all(char == input[0] for char in input) # The all function checks if all the elements in the input are iterable and with the help of set function, we check the similarity of the characters present in the input
# Example
print(similarity_in_between_characters("fffff")) # Case-1
print(similarity_in_between_characters("asdda")) # Case-2

輸出

上面示例的輸出如下：-

True # All the characters are same in the first case
False # There are different characters present in the second case

集合和長度函式的組合

這是一種非常簡短的程式設計方法，我們將使用 length 函式來查詢字串的長度，並藉助 set 函式來檢查字串字元的相似性。讓我們看一下語法，並透過一個示例來更好地理解它：-

示例

def similarity_in_between_characters(input):# The string is given as input to the function similarity_in_between_characters
   return len(set(input)) == 1 # The length of the string is found and then the similarity of the characters is checked and if it remains 1 then the output is given as true
#Example 
print(similarity_in_between_characters("fffff")) # Case-1 
print(similarity_in_between_characters("fsdwa")) # Case-2 

輸出

上面示例的輸出如下：-

True # All the characters are same in the first case
False # There are different characters present in the second case

max 和集合函式

在這種方法中，我們使用 max 和 set 函式的組合，首先借助 set 函式找到唯一字元，然後藉助 max 函式找到給定輸入中的最大字元。如果最大和最小字元之間的差為零，則輸出將顯示為 true。讓我們看一下語法，並透過一個示例來更好地理解它：-

示例

def similarity_in_between_characters(input): # The string is given as input to the function similarity_in_between_characters
   return len(set(input)) == 1 or max(input) == min(input) # The output will be displayed as true if the maximum characters are equal to the minimum characters or else the output will be false
# Example
print(similarity_in_between_characters("fffff")) # Case-1
print(similarity_in_between_characters("asdwd")) # Case-2

輸出

上面示例的輸出如下：-

True # All the characters are same in the first case
False # There are different characters present in the second case

結論

要成為一名高效的程式設計師，有必要了解在 Python 中檢查字串是否包含所有相同字元的不同方法。可以參考本文來了解檢查字元之間相似性的不同方法，並可以根據需要使用其中的任何一種。