Subtracting dates to get hours and minutes

[Thomas Passin]

Oops,

"items = dstr[1:-2].split(',')"

should have read

"items = dstr[1:-1].split(',')".

On 12/15/2022 1:56 PM, Thomas Passin wrote:
> It's hard to be sure from what you have offered, but I suspect that you 
> are taking the string "(2022, 12, 13,  5,  3, 30)" from the file and 
> using it as is.  When you feed that in as a starred argument, the string 
> gets treated as a sequence where each item is a character in the string. 
>   Your example contains 26 characters, which matches the error message, 
> so that's probably what is going on.
> 
> You need to convert the string into the correct integers, because is the 
> datetime function expects to get integers, not strings.  It isn't going 
> to work with a string that looks like a tuple when it is printed.
> 
> Here is one way you could do this.  From the input file, extract the 
> string. Call it dstr.  Then you have to get rid of the parentheses and 
> separate out each item so you can convert it into an integer.  So:
> 
> items = dstr[1:-2].split(',')  # This creates a list of strings.
> # print(items) --> ['2022', ' 12', ' 13', '  5', '  3', ' 3']
> 
> # Create a tuple of integers from the string items
> seq = (int(n) for n in items)
> # or make it a list instead: seq = [int(n) for n in items]
> 
> # And here is the datetime object you wanted
> d1 = datetime.datetime(*seq)
> 
> 
> On 12/15/2022 1:14 PM, Gronicus at SGA.Ninja wrote:
>> So far so good , I can now use a variable in datetime.datetime but it 
>> only
>> works if I hard-code the time/date information. Now I want to have the 
>> code
>> read from a file but I get: TypeError: function takes at most 9 arguments
>> (26 given)
>>
>> I figure that the structure in the file is incorrect. What should it 
>> be? The
>> entry in the file is (2022, 12, 13,  5,  3, 30) but when my program 
>> tries to
>> use it I get the error.
>>
>> The program is a bit more sophisticated now but here is the update with a
>> sample of the SPECIFICATIONS.txt file:
>> =====================================================================
>>
>> # This program compares two Timedate values, subtracts the two and
>> # converts the difference to seconds and hours.
>> #
>>
>> #  %A Monday    #  %a Mon           #  %B January   #  %b Jan
>> #  %d 05 day    #  %m month as 01   #  %Y 2020      #  %y 20
>> #  %H 24        #  %I 12            #  %M 30 min    #  %S Seconds
>>
>> import time
>> import datetime
>> from time import gmtime, strftime ##define strftime as time/date right 
>> now
>> # ======================================================
>>
>> def GetSpecByItem(GetThisOne):  #get line by item in column 4 - 7
>>      ItemValue = "--"
>>      with open("SPECIFICATIONS.txt" , 'r') as infile:
>>       for lineEQN in infile: # loop to find each line in the file for 
>> that
>> dose
>>          if ((lineEQN[4:7]== GetThisOne)):
>>             ItemValue = lineEQN[30:60].strip()   # Just the Data
>>      return(ItemValue)
>>
>> """
>> SPECIFICATIONS.txt
>>
>> IYf HRB Humalog R Date           (2018, 12, 4, 10,  7, 00)           ##
>> IYf HRG Humulin R Date           (2022, 12, 13,  5,  3, 30)          ##
>> """
>> # ====================== Main() ======================================
>> print()
>> Startt = "404"
>> Stopp  = "404"
>>
>> Answer = "Y"
>> Answer = input("Run test A? (" + Answer + ")" )
>>
>> if Answer == "Y" or Answer == "y" or Answer == "":
>>     print()
>>     print("     Running Test A:")
>> #           Year  Mth Day Hour Min Sec
>>     Startt  =   2018, 12, 4, 10,  7, 00
>>     Stopp   =   2022, 12, 12, 1, 15, 30
>>     NowTime =   2022, 12, 14, 21, 15, 30
>> else:
>>     print("     Running Test B:")
>>     Startt = GetSpecByItem("HRG")
>>     Stopp =  GetSpecByItem("HRB")
>>     NowTime = strftime("(%Y, %m, %d, %H, %M, %S)")
>> print()
>> print("55    NowTime = " + str(NowTime))
>> print("56     Startt = " + str(Startt))
>> print("57      Stopp = " + str(Stopp))
>> print()
>>
>> NowTime =  datetime.datetime(*NowTime)
>> Startt =   datetime.datetime(*Startt)
>> Stopp =    datetime.datetime(*Stopp)
>>
>> #Start == Startt  # True"
>> #print("Startt test = " + Start)
>> # =================================================
>> print()
>> c = NowTime - Stopp
>> minutes = c.total_seconds() / 60
>> minutes = c.seconds / 60
>> hours = 0
>>
>> while (minutes > 59):
>>          minutes = minutes - 60
>>          hours += 1
>> minutes = round(minutes)
>> print ("77 Hours =     <" + str(hours) + ">")
>> print ("78 Minutes =   <" + str(minutes) + ">")
>> if hours > 7:
>>      print(" Time to inject Humulin R u500.")
>>
>> pause = input("Pause")
>> # ======================================================
>>
>>
>> -----Original Message-----
>> From: Python-list <python-list-bounces+gronicus=sga.ninja at python.org> On
>> Behalf Of Thomas Passin
>> Sent: Tuesday, December 13, 2022 11:20 PM
>> To: python-list at python.org
>> Subject: Re: Subtracting dates to get hours and minutes
>>
>> Your problem is that datetime.datetime does not accept a tuple as an
>> argument.  It expects an integer value for the first argument, but you
>> supplied a tuple.  In Python, you can use a sequence (e.g., tuple or
>> list) the way you want by prefixing it with an asterisk.  This causes the
>> sequence of items to be treated as individual arguments. So:
>>
>> Startt = datetime.datetime(2022, 12, 13,  5,  3, 30)
>> st1 = (2022, 12, 13,  5,  3, 30)
>> dts1 = datetime.datetime(*st1)  # NOT datetime.datetime(st1)
>> dts1 == Startt  # True
>>
>> On 12/13/2022 10:43 PM, Gronicus at SGA.Ninja wrote:
>>>    As is, Test A works.
>>>    Comment out Test A and uncomment Test B it fails.
>>>    In Test B, I move the data into a variable resulting with the report:
>>>               "TypeError: an integer is required (got type tuple)
>>>
>>> How do I fix this?
>>>
>>> #---------------------------------------------------------------------
>>> --------
>>> import datetime
>>> #=================================================
>>> #         Test A   Hard coded Date/Time
>>> Startt = datetime.datetime(2022, 12, 13,  5,  3, 30) Stopp =
>>> datetime.datetime(2022, 12, 12, 21, 15, 30)
>>>
>>> # =================================================
>>> #         Test B   Date/Time data as a variable
>>> #Startt = (2022, 12, 13,  5,  3, 30)
>>> #Stopp =  (2022, 12, 12, 21, 15, 30)
>>>
>>> #Startt = datetime.datetime(Startt)
>>> #Stopp =  datetime.datetime(Stopp)
>>>
>>> # =================================================
>>> c = Startt - Stopp
>>> minutes = c.total_seconds() / 60
>>> minutes = c.seconds / 60
>>> hours = 0
>>>
>>> while (minutes > 59):
>>>           minutes = minutes - 60
>>>           hours += 1
>>> minutes = round(minutes)
>>> print()
>>> print ("       Hours =  <" + str(hours) + ">")
>>> print ("     Minutes =  <" + str(minutes) + ">")
>>>
>>> #
>>> ----------------------------------------------------------------------
>>> -------
>>>
>>
>> -- 
>> https://mail.python.org/mailman/listinfo/python-list
>>
>