python中print后面加逗号

phrase = "abcdefg"
# Add your for loop
for char in phrase:
        print char

a
b
c
d
e
f
g

phrase = "A bird in the hand..."

# Add your for loop
for char in phrase:
    if(char == "A" or char == ‘a‘):
        print ‘X‘,
    else:
        print char,
#Don‘t delete this print statement!
print

X   b i r d   i n   t h e   h X n d . . .