Python – Replace words from Dictionary
Given String, replace it’s words from lookup dictionary.
Input : test_str = ‘geekforgeeks best for geeks’, repl_dict = {“geeks” : “all CS aspirants”}
Output : geekforgeeks best for all CS aspirants
Explanation : “geeks” word is replaced by lookup value.Input : test_str = ‘geekforgeeks best for geeks’, repl_dict = {“good” : “all CS aspirants”}
Output : geekforgeeks best for geeks
Explanation : No lookup value, unchanged result.
Method #1 : Using split() + get() + join()
In this, we initially split the list using split(), then look for lookups using get(), and if found, replaced and joined back to string using join().
Python3
# Python3 code to demonstrate working of # Replace words from Dictionary# Using split() + join() + get() # initializing stringtest_str = 'geekforgeeks best for geeks' # printing original stringprint("The original string is : " + str(test_str)) # lookup Dictionarylookp_dict = {"best" : "good and better", "geeks" : "all CS aspirants"} # performing split()temp = test_str.split()res = []for wrd in temp: # searching from lookp_dict res.append(lookp_dict.get(wrd, wrd)) res = ' '.join(res) # printing result print("Replaced Strings : " + str(res)) |
The original string is : geekforgeeks best for geeks Replaced Strings : geekforgeeks good and better for all CS aspirants
Method #2 : Using list comprehension + join()
Similar to above method, difference just being 1 liner rather than 3-4 steps in separate lines.
Python3
# Python3 code to demonstrate working of # Replace words from Dictionary# Using list comprehension + join() # initializing stringtest_str = 'geekforgeeks best for geeks' # printing original stringprint("The original string is : " + str(test_str)) # lookup Dictionarylookp_dict = {"best" : "good and better", "geeks" : "all CS aspirants"} # one-liner to solve problemres = " ".join(lookp_dict.get(ele, ele) for ele in test_str.split()) # printing result print("Replaced Strings : " + str(res)) |
The original string is : geekforgeeks best for geeks Replaced Strings : geekforgeeks good and better for all CS aspirants
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