python31格式化字符串

http://www.pythonclub.org/python-basic/print
nHex=0x20
nstr=’nHex=%x,nDec=%d,nOct=%o’%(nHex,nHex,nHex)
print(nstr)
import math
#default
print( "PI = %f"%(math.pi))
#width = 10,precise = 3,align = left
print("PI = %10.3f"%(math.pi))
#width = 10,precise = 3,align = rigth
print("PI = %-10.3f"%(math.pi))
#前面填充字符
print("PI = %06d"%(int(math.pi)))
nstr=’hello {0},{1}’.format(‘world’,10)
print(nstr)