I have string like: st= 'Product=Product Name 25'
Want to lstrip. output desired: out= 'Product Name 25'
For this i am doing like out = st.lstrip('Product=')
Here I am getting as output as out= 'Name 25'.This is I don't want.
As it is removing all occurence in my string but need to remove the first occurence.
Desired output should be: out= 'Product Name 25'
Use split instead:
>>> st= 'Product=Product Name 25'
>>> st.split("Product=")[1]
'Product Name 25'
Use replace instead:
st = 'Product=Product Name 25'
print(st.replace('Product=', ''))
>> Product Name 25
If it wasn't for the '=' you could have also take advantage of the count argument that replace has, for example:
st = 'Product Product Name 25'
print(st.replace('Product', '', 1))
>> Product Name 25
You could do out = st.replace('Product=Product','Product') or out = st.replace('Product=Product',''). I tend to find that simple and readable.
Just in case you're reading key-value pairs from a text file, there's a python module in the standard library for that: ConfigParser
According to the documentation, the lstrip function remove the characters in chars.
>>> help(str.lstrip)
Help on method_descriptor:
lstrip(...)
S.lstrip([chars]) -> str
Return a copy of the string S with leading whitespace removed.
**If chars is given and not None, remove characters in chars instead.**
So st.lstrip('Product=') removes "P", "r", "o", "d", "u", "c", "t", "=" at the beginning of "Product=Product Name 25". Then, the two words are removed!
I think your string represents a "key=value" pair.
The best way to split it is to use split() method:
st = "Product=Product Name 25"
key, value = st.split("=")
print("key: " + key)
print("value: " + value)
You get:
key: Product
value: Product Name 25
Only the value:
value = st.split("=")[1]
print("value only: " + value)
You get:
value only: Product Name 25
If you want a "left-trim":
p = "Product="
value = st[len(p):]
print("trimmed value: " + value)
You get:
trimmed value: Product Name 25
lstripaccepts a set of characters to remove, not a string pattern to remove.Product=can occur anywhere in the string, not only at the start?