Data Types¶
Built-in Data Types¶
MicroPython has the following data types:
Text Type: str
Numeric Types: int, float, complex
Sequence Types: list, tuple, range
Mapping Type: dict
Set Types: set, frozenset
Boolean Type: bool
Binary Types: bytes, bytearray, memoryview
Getting the Data Type¶
You can get the data type of any object by using the type() function:
a = 6.8
print(type(a))
>>> %Run -c $EDITOR_CONTENT
<class 'float'>
Setting the Data Type¶
MicroPython does not need to set the data type specifically, it has been determined when you assign a value to the variable.
x = "welcome"
y = 45
z = ["apple", "banana", "cherry"]
print(type(x))
print(type(y))
print(type(z))
>>> %Run -c $EDITOR_CONTENT
<class 'str'>
<class 'int'>
<class 'list'>
>>>
Setting the Specific Data Type¶
If you want to specify the data type, you can use the following constructor functions:
Example |
Date Type |
|---|---|
x = int(20) |
int |
x = float(20.5) |
float |
x = complex(1j) |
complex |
x = str(“Hello World”) |
str |
x = list((“apple”, “banana”, “cherry”)) |
list |
x = tuple((“apple”, “banana”, “cherry”)) |
tuple |
x = range(6) |
range |
x = dict(name=”John”, age=36) |
dict |
x = set((“apple”, “banana”, “cherry”)) |
set |
x = frozenset((“apple”, “banana”, “cherry”)) |
frozenset |
x = bool(5) |
bool |
x = bytes(5) |
bytes |
x = bytearray(5) |
bytearray |
x = memoryview(bytes(5)) |
memoryview |
You can print some of them to see the result.
a = float(20.5)
b = list(("apple", "banana", "cherry"))
c = bool(5)
print(a)
print(b)
print(c)
>>> %Run -c $EDITOR_CONTENT
20.5
['apple', 'banana', 'cherry']
True
>>>
Type Conversion¶
You can convert from one type to another with the int(), float(), and complex() methods: Casting in python is therefore done using constructor functions:
int() - constructs an integer number from an integer literal, a float literal (by removing all decimals), or a string literal (providing the string represents a whole number)
float() - constructs a float number from an integer literal, a float literal or a string literal (providing the string represents a float or an integer)
str() - constructs a string from a wide variety of data types, including strings, integer literals and float literals
a = float("5")
b = int(3.7)
c = str(6.0)
print(a)
print(b)
print(c)
Note: You cannot convert complex numbers into another number type.