python print 按逗号或空格分隔的方法

a,b = 0,1 
while b < 1000: 
 print(b,end=',') 
 a,b = b,a+b 
1,1,2,3,5,8,13,21,34,55,89,144,233,377,610,987,

a,end=' ') 
 a,a+b 

1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 

print(...)
 print(value,...,sep=' ',end='n',file=sys.stdout,flush=False)
 
 Prints the values to a stream,or to sys.stdout by default.
 Optional keyword arguments:
 file: a file-like object (stream); defaults to the current sys.stdout.
 sep: string inserted between values,default a space.
 end: string appended after the last value,default a newline.
 flush: whether to forcibly flush the stream.