获取字符串，直到字符第二次出现

def get_string_until_second_occurrence(string, character):
    count = 0
    result = ""
    
    for char in string:
        if char == character:
            count += 1
            if count == 2:
                break
        result += char
    
    return result

# 示例用法
input_string = "This is a sample string. This is the second occurrence."
target_character = "i"
output_string = get_string_until_second_occurrence(input_string, target_character)
print(output_string)