# 
## The `format_map()` method

**`format_map()`** is a built-in method in Python that is used to replace all keys in the string with its values. 

The `format_map()` method returns a new string by concatenating the values in the `dictionary` provided within the specified positions. `format_map()` does not create a new dictionary object; instead, it works by getting `dictionary` values as `arguments`.

# 
#  Syntax

The syntax of the `format_map()` method is shown below.

---
```
string.format_map(mapping)
```
---

##
## Parameters

From the syntax above, the `format_map()` method only takes one required argument. The argument is a `dictionary` value used for mapping.

# 
## `format_map()` versus `format()`

The `format_map()` method is very similar to the `format()` method in Python. The difference is that the **`format()` method** needs to unpack the dictionary while passing arguments.

Additionally, the `format()` method creates a new dictionary while the `format_map()` method does not. Thus, the `format_map()` method is slightly faster than the `format()` method.

#   
## Code

Below are sample codes that use the `format_map()` method.

### Example 1



sample_string = {'firstname':'Jane','lastname':'Doe'}

print('{firstname} {lastname}'.format_map(sample_string))

#   
##   
### Output

---
```xml
Jane Doe
```
---

client_details = { 'name':['Jax', 'Jim'],
               'occupation':['Lawyer', 'Teacher'],
               'age':[35, 30] }
                       

print('{name[0]} is a {occupation[0]} and'
      ' he is {age[0]} years old.'.format_map(client_details))
        
print('{name[1]} is a {occupation[1]} and'
      ' he is {age[1]} years old.'.format_map(client_details))

#   
##   
### Output

---
```xml
Jax is a Lawyer and he is 35 years old.

Jim is a Teacher and he is 30 years old.
```
---

What is format_map() in Python?

The format_map() method formats strings by replacing keys with values from a dictionary without creating a new dictionary object.

What is format_map() in Python?

The format_map() method

Syntax

Parameters

format_map() versus format()

Code

Example 1

Output

Example 2

Output

The `format_map()` method

`format_map()` versus `format()`