Replace String, Integer In List Using Python 2023

Typically, beginners making their first program in Python can have some difficulty in creating strings using the immutable notation. It is worth remembering that the string list in Python is mutable and the String class in Python is one of the mutable classes. Wherever possible, use the immutable notation. The String replace() method in Python is a convenient way to replace a string with another string in the list of Strings.In python programming language, it is possible to use a list of strings to store the data type string.The string can be replaced in the list by the particular string given.Strings in Python are immutable data type, which means the value can never change. So the code below is just an an instance of creating a new string from the existing string value.Replacing a string in a list is a regular operation in any development. Exploring how to replace a string in a list in Python.

Python list replace:

Python has some cool methods for string manipulation. The string replace method will help in replacing a string at a particular position with a different string. Here we’ve given a list of strings and the string ‘string’ and its position in the list is 0. We want to replace ‘string’ with the string ‘string2’. So the string replace method in Python will change the string at position 0 to string2.Strings are immutable data type in python. We can simply assign a new string to a string if we need to replace a string in a list.

Example #1:

# app.py

data = ['Python', '5', 'Golang', '4', 'PHP', '3']

# printing data list
print("The original list : " + str(data))

# using list comprehension + replace()
# Replace substring in list of strings
res = [item.replace('4', '5') for item in data]

# print result
print("The list after substring replacement : " + str(res))

########Output

The original list : ['Python', '5', 'Golang', '4', 'PHP', '3']
The list after substring replacement : ['Python', '5', 'Golang', '5', 'PHP', '3']

In programming, Strings hold some data. Strings can be easily created in Python. The string itself is immutable, so it cannot be changed, only appended to. The built-in str() function creates a new string from a list of characters. The string replace() method in Python will help us replace a string with a particular string in the list of Strings.

Example #2:

data = ['Python', '5', 'Golang', '4', 'PHP', '3']

# printing data list
print("The original list : " + str(data))

# using list comprehension + replace()
# Replace substring in list of strings
res = [item.replace('Golang', 'Go') for item in data]

# print result
print("The list after string replacement : " + str(res))

Output

The original list : ['Python', '5', 'Golang', '4', 'PHP', '3']
The list after string replacement : ['Python', '5', 'Go', '4', 'PHP', '3']

List replace Using map() + lambda + replace():

String in Python is an immutable Data type. The data type is immutable which means that you can’t change it during the execution of the program. The str.replace() method will help us replace a given string with a particular string in the list of Strings. We need to convert the list of strings into a dictionary to use the replace() method.When we talk about strings in Python, we talk about a mutable data type which is different from an immutable data type. The immutable data type is a type of data that cannot be changed. The immutable data type is a list of an immutable data type. The immutable data type is an array of a list of immutable data type or a dictionary with an immutable data type as its keys. Python String is just like a List. We can change the String in String. To replace a String, we can use String.replace() method.

data = ['Python', '5', 'Golang', '4', 'PHP', '3']

# printing data list
print("The original list : " + str(data))

# using map() + lambda + replace()
# Replace string in list of strings
res = list(map(lambda st: str.replace(st, "PHP", ".NET"), data))

# print result
print("The list after string replacement : " + str(res))

Output

The original list : ['Python', '5', 'Golang', '4', 'PHP', '3']
The list after string replacement : ['Python', '5', 'Golang', '4', '.NET', '3']

Replace integer in Python List:

The string contains immutable objects which are not changed. We cannot alter the string or change the string or make a new string. In Python, the string is a kind of list where we can make a list that contains a series of characters. In this article, we are going to learn how to replace string in list using python.It is possible to use the ‘replace()’ method to change a string to another string in the list of strings. There are a few rules that need to be followed. First, the ‘replace()’ method will return a list with the new string and the old string. Second, the new string must be contained in the list that ‘replace()’ is called on. Third, the old string must have been contained in the list that ‘replace()’ is called on. Finally, the new string can be any type of string, while the old string must be a string.

data = [19, 11, 23, 18, 46, 23]

# printing data list
print("The original list : " + str(data))

# using list comprehension + ternary operator
# Replace integer in list of integers
res = [21 if item == 23 else item for item in data]

# print result
print("The list after integer replacement : " + str(res))

Output

The original list : [19, 11, 23, 18, 46, 23]
The list after integer replacement : [19, 11, 21, 18, 46, 21]

Python Replace string in list with integer:

You can use the replace() method to replace a specific string in the list with a different string.The python library provides the string replace() method. The string replace() method replaces a string with another string in a list of strings. The pattern we are using, is a regular operation in any development. Replace a string with another string in a list of strings.

Example #1:

l= ['X','X',52,39,81,12,'X',62,94]
a=map(lambda x:0 if x=="X" else x,l)
print(a)

#################Output
[0, 0, 52, 39, 81, 12, 0, 62, 94]

Example #2:

l= ['X','X',52,39,81,12,'X',62,94]
b=[i if i!='X' else 0 for i in l]
print(b)

################Output
[0, 0, 52, 39, 81, 12, 0, 62, 94]

How to replace a string with another string in the list of Strings in Python. The string replace() method in Python will help us replace a string with a particular string in the list of Strings. When we use string replace() method in Python, we have to provide the string that we want to replace and the string that we want to replace it with.A string in python is an immutable data type. If a string is a list of characters, one can replace the old string with a new string. The replace() method in python will help us replace a string with a particular string in a list of strings.

Example #3:

l = ['X', 'X', 52, 39, 81, 12, 'X', 62, 94]
l = [0 if element == 'X' else element for element in l]
print(l)

###########output
[0, 0, 52, 39, 81, 12, 0, 62, 94]

How do you replace integers in a list with a string in python?

It is possible to replace a string with another string in a list of Strings in Python. The replace() method allows us to change a string in the list and return a new list with the replacement.In python, the string replace() method is used to replace a string with another string in a list.The following is a program which will change an item from a list into a string and then from the string into another integer. The list is created by python.

Example #1:

list = [10 , 11, 12, 13, 14, 15, 16,]

print([(i,'odd')[i%2] for i in list])

##########Output
[10, 'odd', 12, 'odd', 14, 'odd', 16]

Example #2:

list = [10 , 11, 12, 13, 14, 15, 16]

new_list = [i if i % 2 == 0 else "odd" for i in list]

print(new_list)

############Output
[10, 'odd', 12, 'odd', 14, 'odd', 16]

#How to replace string with an int in list in python?

In Python, there are two types of strings: “string” and “str”. Unlike in Java, the word “string” refers to an immutable data type. We cannot change a string in Python. We can, however, change a string to another string. The str() method does this. Our code will look like this:We can replace a string with another string in a list of Strings using the replace() method.

Example #1:

precipitation = ["Sun", "Rain", "Rain", "Sun", "Sun", "Sun", "Sun", "Sun", "Sun", "Sun", "Rain", "Rain", "Rain", "Rain"]
pre = [0 if x == 'Sun' else 1 for x in precipitation]
print(pre)

############Output
[0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1]

Example #2:

precipitation = ["Sun", "Rain", "Rain", "Sun", "Sun", "Sun", "Sun", "Sun", "Sun", "Sun", "Rain", "Rain", "Rain", "Rain"]

print([int(x=='Sun') for x in precipitation])

#Output
[1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0]

Example #3:

precipitation = ["Sun", "Rain", "Rain", "Sun", "Sun", "Sun", "Sun", "Sun", "Sun", "Sun", "Rain", "Rain", "Rain", "Rain"]

for i in range(len(precipitation)):  
  if precipitation[i] == "Sun":
    precipitation[i] = 0
  else:
    precipitation[i] = 1
         
print(precipitation)

##############Output
[0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1]

Find and replace string values in list:

Python is a dynamic language and the string replace() function is a regular function. It will help us change one string with another string in the list of strings. So, let us see how to replace and modify a string in the list of Strings using the string replace() function in Python.

Example #1:

words = ['how', 'much', 'is[br]', 'the', 'fish[br]', 'no', 'really']

words = [w.replace('[br]', '<br />') for w in words]

print(words)

###########output
['how', 'much', 'is<br />', 'the', 'fish<br />', 'no', 'really']

Example #2:

words = ['how', 'much', 'is[br]', 'the', 'fish[br]', 'no', 'really']
words = map(lambda x: str.replace(x, "[br]", "<br/>"), words)
print(words)

#############Output
['how', 'much', 'is<br />', 'the', 'fish<br />', 'no', 'really']

Example #3:

a, b = '[br]', '<br />'
for i, v in enumerate(words):
    if a in v:
        words[i] = v.replace(a, b)
print(words)
['how', 'much', 'is<br />', 'the', 'fish<br />', 'no', 'really']

This post will show you how to change string and integer in list python. In Python, string is an immutable data type. Therefore, changing one string with another string is a regular operation in any development. The string replace() method will help us change a string with a particular string in the list of strings.