[Tutor] Using split with a backslash

[Bryan Fodness]

I have a data pair separated by a backslash. I didn' t think it would see
an end of line if the backslash was inside the quotes.
Can this be done? I don't have a choice in what the separator is.

LeafJawPositions='-42.000000000001\29.800000000001'
LeafJawPositions

'-42.000000000001\x029.800000000001'

x1, x2 = LeafJawPositions.split('\x0')

ValueError: invalid \x escape

x1, x2 = LeafJawPositions.split('\')

SyntaxError: EOL while scanning single-quoted string

[Dave Kuhlman]

Post by Bryan Fodness
I have a data pair separated by a backslash. I didn' t think it would see
an end of line if the backslash was inside the quotes.
Can this be done? I don't have a choice in what the separator is.

LeafJawPositions='-42.000000000001\29.800000000001'
LeafJawPositions

'-42.000000000001\x029.800000000001'

x1, x2 = LeafJawPositions.split('\x0')

ValueError: invalid \x escape

x1, x2 = LeafJawPositions.split('\')

SyntaxError: EOL while scanning single-quoted string

In a literal string, backslash is an escape character. In order to
include a backslash in a literal string, type two backslashes.
Example:

x1, x2 = LeafJawPositions.split('\\')

See http://docs.python.org/ref/strings.html

Another example:

In [1]: a = 'abc\\def\\ghi'
In [2]: len(a)
Out[2]: 11
In [3]: a.split('\')
------------------------------------------------------------
File "<ipython console>", line 1
a.split('\')
^
SyntaxError: EOL while scanning single-quoted string

In [4]: a.split('\\')
Out[4]: ['abc', 'def', 'ghi']


- Dave

[Sander Sweers]

Post by Bryan Fodness
I have a data pair separated by a backslash. I didn' t think it would see
an end of line if the backslash was inside the quotes.

The backlash is seen as an escape character.

Try the below, notice the string prefix r and that the backslash is
now escaped by another backslash.

Post by Bryan Fodness

LeafJawPositions=r'-42.000000000001\29.800000000001'
LeafJawPositions

'-42.000000000001\\29.800000000001'

Post by Bryan Fodness

x1, x2 = LeafJawPositions.split('\\')
x1, x2

('-42.000000000001', '29.800000000001')

See http://docs.python.org/ref/strings.html for more info.

Greets
Sander

[Alan Gauld]

Post by Bryan Fodness
I have a data pair separated by a backslash.
I didn' t think it would see an end of line if the backslash
was inside the quotes.

Backslashes don't indicate end of line, they indicate a
continuation of a line. ie they tell Python to *ignore* the
end of line...

Post by Bryan Fodness
Can this be done? I don't have a choice in what the separator is.

Of course.

Post by Bryan Fodness

LeafJawPositions='-42.000000000001\29.800000000001'
LeafJawPositions

'-42.000000000001\x029.800000000001'

This is reporting \2 as \x02 - which is one character

Post by Bryan Fodness

LeafJawPositions=r'-42.000000000001\29.800000000001'
LeafJawPositions

'-42.000000000001\\29.800000000001'

Note the double \.

Post by Bryan Fodness

LeafJawPositions.split('\\')

['-42.000000000001', '29.800000000001']
HTH,

[Bryan Fodness]

Thanks everyone,
I was trying it this way.

x1, x2 = LeafJawPositions.split(r'\\')

Post by Bryan Fodness

LeafJawPositions='-42.000000000001\29.800000000001'

LeafJawPositions

'-42.000000000001\x029.800000000001'

x1, x2 = LeafJawPositions.split('\x0')

ValueError: invalid \x escape

x1, x2 = LeafJawPositions.split('\')

SyntaxError: EOL while scanning single-quoted string
Hi,

The backslash is used for escaping special characters in a string. In
order to do what you are trying to do, you would need to escape the
backslash using a backslash.
You need to do this in two places in the above code.
LeafJawPositions='-42.000000000001\\29.800000000001'
and
x1, x2 = LeafJawPositions.split('\\')
http://docs.python.org/ref/strings.html
Regards,
Michael

[Kent Johnson]

Post by Bryan Fodness
Thanks everyone,
I was trying it this way.
x1, x2 = LeafJawPositions.split(r'\\')

That is a string containing *two* backslashes.

Kent

[Steve Willoughby]

Post by Bryan Fodness
I have a data pair separated by a backslash. I didn' t think it would see
an end of line if the backslash was inside the quotes.
Can this be done? I don't have a choice in what the separator is.

LeafJawPositions='-42.000000000001\29.800000000001'
LeafJawPositions

'-42.000000000001\x029.800000000001'

x1, x2 = LeafJawPositions.split('\x0')

ValueError: invalid \x escape

x1, x2 = LeafJawPositions.split('\')

Try

x1, x2 = LeafJawPositions.split('\\')