I'm trying to open a text file and then read through it replacing certain strings with strings stored in a dictionary.
Based on answers to How do I edit a text file in Python? I could pull out the dictionary values before doing the replacing, but looping through the dictionary seems more efficient.
The code doesn't produce any errors, but also doesn't do any replacing.
import fileinput
text = "sample file.txt"
fields = {"pattern 1": "replacement text 1", "pattern 2": "replacement text 2"}
for line in fileinput.input(text, inplace=True):
line = line.rstrip()
for i in fields:
for field in fields:
field_value = fields[field]
if field in line:
line = line.replace(field, field_value)
print line
I used items()
to iterate over key
and values
of your fields
dict.
I skip the blank lines with continue
and clean the others with rstrip()
I replace every keys
found in the line
by the values
in your fields
dict, and I write every lines with print
.
import fileinput
text = "sample file.txt"
fields = {"pattern 1": "replacement text 1", "pattern 2": "replacement text 2"}
for line in fileinput.input(text, inplace=True):
line = line.rstrip()
if not line:
continue
for f_key, f_value in fields.items():
if f_key in line:
line = line.replace(f_key, f_value)
print line