How does Python calculate the number of occurrences of a specific character in a string?

To calculate the number of times a certain character appears in a string, you can use the count() method in Python. For example:

# 定义一个字符串
s = "Hello, World!"

# 计算字符'l'出现的次数
count = s.count('l')

print(count)  # 输出结果为 3

The code above will output the number of times the character ‘l’ appears in the string. You can also replace it with other characters as needed for calculation.