检查第一个和最后一个字符时的Python字符串问题

def check_first_char(string, char):
    return string[0] == char

def check_last_char(string, char):
    return string[-1] == char

def check_first_and_last_char(string, first_char, last_char):
    return string[0] == first_char and string[-1] == last_char

# 示例字符串
example_string = "hello"

# 检查第一个字符是否为 'h'
print(check_first_char(example_string, 'h'))  # 输出: True

# 检查最后一个字符是否为 'o'
print(check_last_char(example_string, 'o'))  # 输出: True

# 同时检查第一个和最后一个字符
print(check_first_and_last_char(example_string, 'h', 'o'))  # 输出: True

empty_string = ""
print(empty_string[0])  # 引发 IndexError

def safe_check_first_char(string, char):
    if string:
        return string[0] == char
    return False

def safe_check_last_char(string, char):
    if string:
        return string[-1] == char
    return False

empty_string = ""
print(check_first_char(empty_string, 'h'))  # 输出: False
print(check_last_char(empty_string, 'o'))  # 输出: False