Python 3.3 String format

#value
print("{0}, {1}, {2}".format("1", "2", "3"))

#value
print("I love {name}".format(name="dog"))


#integer
print("integer:{:d}".format(10))
print("integer:{:d}".format(12345))


#Expressing a percentage
print("{:.1%}".format(15))
print("{:.2%}".format(155))
print("{:.3%}".format(1555))

#float
print("float:{:+f}".format(3.14))
print("float:{:+f}".format(3.1415))
print("float:{:+f}".format(3.121592))


#double
print("double:{:+e}".format(3.14))
print("double:{:+e}".format(3.1415))
print("double:{:+e}".format(3.141592))
print("double:{:+E}".format(3.14))
print("double:{:+E}".format(3.1415))
print("double:{:+E}".format(3.141592))


#HEX
print("HEX:{:x}".format(10))
print("HEX:{:x}".format(0x10))

#OCT
print("OCT:{:o}".format(10))
print("OCT:{:o}".format(0x10))

#BIN
print("BIN:{:b}".format(10))
print("BIN:{:b}".format(0x10))

#Using the comma as a thousands separator:
print("{:,}".format(123456789))


#Aligning the text and specifying a width
print("{:<20}".format("test test test"))
print("{:>20}".format("test test test"))
print("{:^20}".format("test test test"))
print("{:*^20}".format("test test test"))

#date
import datetime
d = datetime.datetime(2014, 9, 18, 12, 00, 00)
print("{:%Y-%m-%d %H:%M:%S}".format(d))
d = datetime.datetime(2014, 9, 18)
print("{:%Y-%m-%d}".format(d))

參考資料：
http://docs.python.org/3/library/string.html#format-string-syntax