还有一个内置函数叫做max...工作起来很有魅力

这个问题是9年前提出的，但我给出我的答案，因为这个问题今天仍然相关
我们可以对数字和字符串都这样做
A）查找给定列表中的最大***号***：

your_list = [54, 26, 29, 48, 56, 32, 15, 17]
largest_num = -99999999 # Any value below zero is ok if you know there 
                        # are larger numbers in the list
    
for i in your_list:     # Checking every item in the list
    print("current number:", i) # Printing every item in the list 
                                # regardless of their value
    if i > largest_num: # Is it larger than -99999999?!
        largest_num = i # then value of largest number should be equal 
                        # to the value of i(as integer) 
print("largest number:",largest_num) # Let's print the result when 
                                     #  we're done

B）查找给定列表中最大的***字符串***：

my_list = ["a", "b", "c", "A", "B", "C", " "]
largest_str = my_list[0]
for i in my_list:
    print("current str:", i)
    if i > largest_str:
        largest_str = i

print("largest_str:", largest_str)