输入一个字符串 str=”7n@5m python is sample %64? ”，分别统计出其中英文字母、空格、数字和其它字符的个数。写出python的代码

str = "7n@5m python is sample d?"
letter_count = 0
space_count = 0
digit_count = 0
other_count = 0

for char in str:
if char.isalpha():
letter_count += 1
elif char.isspace():
space_count += 1
elif char.isdigit():
digit_count += 1
else:
other_count += 1

print("英文字母个数：", letter_count)
print("空格个数：", space_count)
print("数字个数：", digit_count)
print("其它字符个数：", other_count)