I try to change the path in an SVG from cm to mm units. The path is defined by the string "d" and looks like this:
<path d="M317.3962167,-142.7 L317.3962167,-142.7 ...
I now want to move all the decimal points by an increment i (for cm to mm -> i=1). The result should look like:
<path d="M3173.962167,-1427 L3173.962167,-1427
or
<path d="M3173.962167,-1427.0 L3173.962167,-1427.0
so if the decimal point is moved and the following list entry is empty either the decimal point should then be erased or a "0" would need to be added. whatever is easier. I assume that first moving all decimal points and then erasing the points which are followed by an empty space in a second loop is the best option.
What I've got so far:
def cm_to_mm(chars, char, increment):
# Convert character sequence to list type.
char_list = list(chars)
if "." in chars:
# Get the current index of the target character.
old_index = char_list.index(char)
# Remove the target character from the character list.
char = char_list.pop(old_index)
# Insert target character at a new location.
new_index = old_index + increment
char_list.insert(new_index, char)
# Convert character list back to str type and return.
return ''.join(char_list)
But this moves only the first occurance of "."
I checked a lot of posts already but most are only talking about moving a character to the end with "append", which is not helping in my case. Thanks for your help, it's really appreciated!
You can use regex. You can save to manage string positions.
import re
def rpl(mo):
v= float(mo[0])*10
return str(v)
s= '<path d="M317.3962167,-142.7 L317.3962167,-142.7" >'
re.sub(r"[-]?\d+[\.]?\d*",rpl,s)
'<path d="M3173.962167,-1427.0 L3173.962167,-1427.0" >'
In re.sub the r"[-]?\d+[\.]?\d*" is the pattern of the float, rpl is a routin with match object as argument, m[0] is the first match, i.e. the float.