转换整型到某base的字符串

itoa.py

hex_table = {
        0: "0",
        1: "1",
        2: "2",
        3: "3",
        4: "4",
        5: "5",
        6: "6",
        7: "7",
        8: "8",
        9: "9",
        10: "a",
        11: "b",
        12: "c",
        13: "d",
        14: "e",
        15: "f"
        }

def itoa(h, base):
    if base > 16:
        return
    neg = 0
    if h < 0:
        neg = 1
        h = -h
    b = []
    while h:
        r = h % base 
        b.append(hex_table[r]) 
        h = h / base 
    b.reverse()
    if not neg:
        return "".join(b) 
    else:
        return "-"+"".join(b)

#for i in range(1000, 1100): 
#    print "{:<5}{:<10}".format(i, itoa(i, 16))

output

1000 3e8       
1001 3e9       
1002 3ea       
1003 3eb       
1004 3ec       
1005 3ed       
1006 3ee       
1007 3ef       
1008 3f0       
1009 3f1       
1010 3f2       
1011 3f3       
1012 3f4       
1013 3f5       
1014 3f6       
1015 3f7       
1016 3f8       
1017 3f9       
1018 3fa       
1019 3fb       
1020 3fc       
1021 3fd       
1022 3fe       
1023 3ff       
1024 400       
1025 401       
1026 402       
1027 403       
1028 404       
1029 405       
1030 406       
1031 407       
1032 408       
1033 409       
1034 40a       
1035 40b       
1036 40c       
1037 40d       
1038 40e       
1039 40f       
1040 410       
1041 411       
1042 412       
1043 413       
1044 414       
1045 415       
1046 416       
1047 417       
1048 418       
1049 419       
1050 41a       
1051 41b       
1052 41c       
1053 41d       
1054 41e       
1055 41f       
1056 420       
1057 421       
1058 422       
1059 423       
1060 424       
1061 425       
1062 426       
1063 427       
1064 428       
1065 429       
1066 42a       
1067 42b       
1068 42c       
1069 42d       
1070 42e       
1071 42f       
1072 430       
1073 431       
1074 432       
1075 433       
1076 434       
1077 435       
1078 436       
1079 437       
1080 438       
1081 439       
1082 43a       
1083 43b       
1084 43c       
1085 43d       
1086 43e       
1087 43f       
1088 440       
1089 441       
1090 442       
1091 443       
1092 444       
1093 445       
1094 446       
1095 447       
1096 448       
1097 449       
1098 44a       
1099 44b