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1 """times module
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2
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3 This module provides some Date and Time classes for dealing with MySQL data.
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4
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5 Use Python datetime module to handle date and time columns."""
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6
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7 from time import localtime
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8 from datetime import date, datetime, time, timedelta
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9 from _mysql import string_literal
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10
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11 Date = date
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12 Time = time
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13 TimeDelta = timedelta
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14 Timestamp = datetime
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15
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16 DateTimeDeltaType = timedelta
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17 DateTimeType = datetime
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18
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19 def DateFromTicks(ticks):
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20 """Convert UNIX ticks into a date instance."""
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21 return date(*localtime(ticks)[:3])
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22
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23 def TimeFromTicks(ticks):
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24 """Convert UNIX ticks into a time instance."""
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25 return time(*localtime(ticks)[3:6])
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26
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27 def TimestampFromTicks(ticks):
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28 """Convert UNIX ticks into a datetime instance."""
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29 return datetime(*localtime(ticks)[:6])
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30
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31 format_TIME = format_DATE = str
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32
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4
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33 def format_TIMEDELTA(v):
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34 seconds = int(v.seconds) % 60
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35 minutes = int(v.seconds / 60) % 60
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36 hours = int(v.seconds / 3600) % 24
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37 return '%d %d:%d:%d' % (v.days, hours, minutes, seconds)
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38
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0
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39 def format_TIMESTAMP(d):
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40 return d.strftime("%Y-%m-%d %H:%M:%S")
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41
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42
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43 def DateTime_or_None(s):
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44 if ' ' in s:
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45 sep = ' '
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46 elif 'T' in s:
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47 sep = 'T'
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48 else:
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49 return Date_or_None(s)
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50
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51 try:
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52 d, t = s.split(sep, 1)
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53 return datetime(*[ int(x) for x in d.split('-')+t.split(':') ])
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54 except:
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55 return Date_or_None(s)
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56
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57 def TimeDelta_or_None(s):
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58 from math import modf
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59 try:
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60 h, m, s = s.split(':')
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61 td = timedelta(hours=int(h), minutes=int(m), seconds=int(float(s)),
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62 microseconds=int(modf(float(s))[0]*1000000))
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63 if h < 0:
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64 return -td
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65 else:
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66 return td
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67 except:
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68 return None
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69
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70 def Time_or_None(s):
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71 from math import modf
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72 try:
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73 h, m, s = s.split(':')
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74 return time(hour=int(h), minute=int(m), second=int(float(s)),
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75 microsecond=int(modf(float(s))[0]*1000000))
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76 except:
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77 return None
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78
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79 def Date_or_None(s):
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80 try: return date(*[ int(x) for x in s.split('-',2)])
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81 except: return None
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82
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83 def DateTime2literal(d, c):
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84 """Format a DateTime object as an ISO timestamp."""
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85 return string_literal(format_TIMESTAMP(d),c)
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86
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87 def DateTimeDelta2literal(d, c):
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88 """Format a DateTimeDelta object as a time."""
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4
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89 return string_literal(format_TIMEDELTA(d),c)
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0
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90
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91 def mysql_timestamp_converter(s):
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92 """Convert a MySQL TIMESTAMP to a Timestamp object."""
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93 # MySQL>4.1 returns TIMESTAMP in the same format as DATETIME
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94 if s[4] == '-': return DateTime_or_None(s)
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95 s = s + "0"*(14-len(s)) # padding
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96 parts = map(int, filter(None, (s[:4],s[4:6],s[6:8],
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97 s[8:10],s[10:12],s[12:14])))
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98 try: return Timestamp(*parts)
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99 except: return None
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