Programming Forums > Script Programming > Python

poopman · Feb 12th, 2007, 3:06 PM

Hey all,

I've wrtting something that gathers the date from a mySQL database but I need to be able to grab the year, or month, or day, or everything if needed. When I get the date from my database I get this:

(datetime.date(2007, 2, 9),)

How would I format it so I can have the dates end up like this?:

2009-02-09

Any help is much appreciated! :banana:

Arevos · Feb 12th, 2007, 3:12 PM

 python Syntax (Toggle Plain Text) 
dateObject.strftime("%Y-%m-%d")
dateObject.strftime("%Y-%m-%d")

poopman · Feb 12th, 2007, 3:21 PM

Cool, thanks.

Another question as I am fairly new to python. How do I apply the .strftime to that tuple that I posted?

Arevos · Feb 12th, 2007, 5:04 PM

If you want to access an element of a tuple, you can use indices, in the same way you would an array or list:

 python Syntax (Toggle Plain Text) 
result = (datetime.date(2007, 2, 9),)
date = result[0]
print date.strftime("%Y-%m-%d")
result = (datetime.date(2007, 2, 9),)
date = result[0]
print date.strftime("%Y-%m-%d")

Or simply:

 python Syntax (Toggle Plain Text) 
print result[0].strftime("%Y-%m-%d")
print result[0].strftime("%Y-%m-%d")

You can also assign a tuple to an set of variables to get its contents:

 python Syntax (Toggle Plain Text) 
coords = (4, 6)
x, y = coords
coords = (4, 6)
x, y = coords

And for a tuple with a single value:

 python Syntax (Toggle Plain Text) 
result = (datetime.date(2007, 2, 9),)
date, = result
result = (datetime.date(2007, 2, 9),)
date, = result

This notation when applied to only one value is a little obscure, however.

poopman · Feb 12th, 2007, 5:22 PM

Quote:

Originally Posted by Arevos

If you want to access an element of a tuple, you can use indices, in the same way you would an array or list:

 python Syntax (Toggle Plain Text) 
result = (datetime.date(2007, 2, 9),)
date = result[0]
print date.strftime("%Y-%m-%d")
result = (datetime.date(2007, 2, 9),)
date = result[0]
print date.strftime("%Y-%m-%d")

Or simply:

 python Syntax (Toggle Plain Text) 
print result[0].strftime("%Y-%m-%d")
print result[0].strftime("%Y-%m-%d")

You can also assign a tuple to an set of variables to get its contents:

 python Syntax (Toggle Plain Text) 
coords = (4, 6)
x, y = coords
coords = (4, 6)
x, y = coords

And for a tuple with a single value:

 python Syntax (Toggle Plain Text) 
result = (datetime.date(2007, 2, 9),)
date, = result
result = (datetime.date(2007, 2, 9),)
date, = result

This notation when applied to only one value is a little obscure, however.

Thanks for this. I tried out all these methods and kept coming up with this error:

AttributeError: 'tuple' object has no attribute 'strftime'

I can't figure out why this isn't working as it seems pretty straightfoward.

Arevos · Feb 12th, 2007, 5:38 PM

What that means is that the object you're trying to reference is not a date object, but a tuple. Might I see your code?

poopman · Feb 12th, 2007, 5:45 PM

I had to omit the SQL statement for work purposes, but here's all the code after that:

(Toggle Plain Text)

cursor.execute(sql_first_look)
result = cursor.fetchall()
date = result[0]

print date.strftime("%Y-%m-%d")
connection.commit()
cursor.close()
connection.close()

Arevos · Feb 12th, 2007, 5:57 PM

The "fetchall" function returns a list of tuples that represents the rows in your resultset. So result[0] returns the first item of the list; a tuple. You'd have to then index that again to get the first item of the tuple: result[0][0]

However, if you only expect your SQL to return one result, it's better to use "fetchone" instead.

 python Syntax (Toggle Plain Text) 
cursor.execute(sql_first_look)
result = cursor.fetchone()
date = result[0]
 
print date.strftime("%Y-%m-%d")
cursor.execute(sql_first_look)
result = cursor.fetchone()
date = result[0]

print date.strftime("%Y-%m-%d")

Also, I'm not sure you need connection.commit() unless your SQL statement is part of a transaction that alters the database. Nor do you need to close your cursor separately to your database; closing the database closes the cursor too.

So it's likely you just need:

 python Syntax (Toggle Plain Text) 
connection.close()
connection.close()

poopman · Feb 12th, 2007, 6:01 PM

That worked! Thanks a lot!

:banana: :banana:

Feb 12th, 2007, 3:06 PM	#1
poopman Newbie Join Date: Feb 2007 Posts: 13 Rep Power: 0	Formatting date from MySQLdb Hey all, I've wrtting something that gathers the date from a mySQL database but I need to be able to grab the year, or month, or day, or everything if needed. When I get the date from my database I get this: (datetime.date(2007, 2, 9),) How would I format it so I can have the dates end up like this?: 2009-02-09 Any help is much appreciated! :banana:

Feb 12th, 2007, 3:12 PM	#2
Arevos Programming Guru Join Date: Aug 2005 Location: England Posts: 1,499 Rep Power: 4	python Syntax (Toggle Plain Text) dateObject.strftime("%Y-%m-%d") dateObject.strftime("%Y-%m-%d")

Feb 12th, 2007, 5:04 PM	#4
Arevos Programming Guru Join Date: Aug 2005 Location: England Posts: 1,499 Rep Power: 4	If you want to access an element of a tuple, you can use indices, in the same way you would an array or list: python Syntax (Toggle Plain Text) result = (datetime.date(2007, 2, 9),) date = result[0] print date.strftime("%Y-%m-%d") result = (datetime.date(2007, 2, 9),) date = result[0] print date.strftime("%Y-%m-%d") Or simply: python Syntax (Toggle Plain Text) print result[0].strftime("%Y-%m-%d") print result[0].strftime("%Y-%m-%d") You can also assign a tuple to an set of variables to get its contents: python Syntax (Toggle Plain Text) coords = (4, 6) x, y = coords coords = (4, 6) x, y = coords And for a tuple with a single value: python Syntax (Toggle Plain Text) result = (datetime.date(2007, 2, 9),) date, = result result = (datetime.date(2007, 2, 9),) date, = result This notation when applied to only one value is a little obscure, however.

Feb 12th, 2007, 5:45 PM	#7
poopman Newbie Join Date: Feb 2007 Posts: 13 Rep Power: 0	I had to omit the SQL statement for work purposes, but here's all the code after that: (Toggle Plain Text) cursor.execute(sql_first_look) result = cursor.fetchall() date = result[0] print date.strftime("%Y-%m-%d") connection.commit() cursor.close() connection.close() cursor.execute(sql_first_look) result = cursor.fetchall() date = result[0] print date.strftime("%Y-%m-%d") connection.commit() cursor.close() connection.close()

Feb 12th, 2007, 5:57 PM	#8
Arevos Programming Guru Join Date: Aug 2005 Location: England Posts: 1,499 Rep Power: 4	The "fetchall" function returns a list of tuples that represents the rows in your resultset. So result[0] returns the first item of the list; a tuple. You'd have to then index that again to get the first item of the tuple: result[0][0] However, if you only expect your SQL to return one result, it's better to use "fetchone" instead. python Syntax (Toggle Plain Text) cursor.execute(sql_first_look) result = cursor.fetchone() date = result[0] print date.strftime("%Y-%m-%d") cursor.execute(sql_first_look) result = cursor.fetchone() date = result[0] print date.strftime("%Y-%m-%d") Also, I'm not sure you need connection.commit() unless your SQL statement is part of a transaction that alters the database. Nor do you need to close your cursor separately to your database; closing the database closes the cursor too. So it's likely you just need: python Syntax (Toggle Plain Text) connection.close() connection.close()

Feb 12th, 2007, 3:21 PM	#3
poopman Newbie Join Date: Feb 2007 Posts: 13 Rep Power: 0	Cool, thanks. Another question as I am fairly new to python. How do I apply the .strftime to that tuple that I posted?

Feb 12th, 2007, 5:38 PM	#6
Arevos Programming Guru Join Date: Aug 2005 Location: England Posts: 1,499 Rep Power: 4	What that means is that the object you're trying to reference is not a date object, but a tuple. Might I see your code?

Feb 12th, 2007, 6:01 PM	#9
poopman Newbie Join Date: Feb 2007 Posts: 13 Rep Power: 0	That worked! Thanks a lot! :banana: :banana:

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Programming Forums > Script Programming > Python

Formatting date from MySQLdb