python每次处理一个字符的三种方法

a_string = "abccdea"

print 'the first'

for c in a_string:

    print ord(c)+1

print "the second"

result = [ord(c)+1 for c in a_string]

print result

print "the thrid"

def do_something(c):

    return ord(c)+1

result = map(do_something ,a_string)

print result

打印出的结果：

the first

98

99

100

100

101

102

98

the second

[98, 99, 100, 100, 101, 102, 98]

the thrid

[98, 99, 100, 100, 101, 102, 98]