+
operator can be used to merge two lists.
data1 = [1, 2, 3] data2 = [4, 5, 6] data = data1 + data2 print(data) # output : [1, 2, 3, 4, 5, 6]
Lists can be merged like this in python.
Building on the same idea, if you want to join multiple lists or a list of lists to a single list, you can still use “+” but inside a reduce method like this,
from functools import reduce l1 = [1, 2, 3] l2 = [4, 5, 6] l3 = [7, 8, 9] l4 = [10, 11, 12] l = [l1, l2, l3, l4] data = reduce(lambda a, b: a+b, l) print(data) # output : [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
Related Posts:
- How to declare an array in Python?
- TypeError: list indices must be integers or slices, not str
- ValueError: setting an array element with a sequence
- TypeError: only size-1 arrays can be converted to Python scalars (matplotlib)
- Numpy ValueError: setting an array element with a sequence. This message may appear without the existing of a sequence?
- numpy: Invalid value encountered in true_divide
- How do I create an empty array/matrix in NumPy?
- ValueError: operands could not be broadcast together with shapes (5,) (30,)
- numpy matrix vector multiplication
- Convert pandas dataframe to NumPy array
- size of NumPy array
- Python List vs. Array – when to use?
- ValueError: all the input arrays must have same number of dimensions
- How to find list intersection?
- ValueError: setting an array element with a sequence
- Using Numpy Vectorize on Functions that Return Vectors
- Is arr.__len__() the preferred way to get the length of an array in Python?
- Is there a NumPy function to return the first index of something in an array?
- Numpy/Python Array Value error
- Python: Array v. List
- initialize a numpy array
- load csv into 2D matrix with numpy for plotting
- How to access the ith column of a NumPy multidimensional array?
- Dump a NumPy array into a csv file
- Python: find position of element in array
- numpy with python: convert 3d array to 2d
- Create 3D array using Python
- Python: slicing a multi-dimensional array
- Shuffle an array with python, randomize array item order with python
- How do I get an empty array of any size in python?
- How to remove specific elements in a numpy array
- TypeError: list indices must be integers or slices, not str
- Add single element to array in numpy
- Python: Write array values into file
- How to create an array of bits in Python?
- How to have an array of arrays in Python
- How to normalize a 2-dimensional numpy array in python less verbose?
- Make list of arrays in python
- Understanding NumPy’s einsum
- How to read a text file into a list or an array with Python
- Python Array Rotation
- How can I create an array/list of dictionaries in python?
- How to fix “TypeError: len() of unsized object”
- TypeError: Invalid dimensions for image data when plotting array with imshow()
- Numpy.dot TypeError: Cannot cast array data from dtype(‘float64’) to dtype(‘S32’) according to the rule ‘safe’
- How to get the unit vector from a numpy array
- Python: Can a function return an array and a variable?
- How to create an integer array in Python?
- numpy-equivalent of list.pop?
- Using numpy to build an array of all combinations of two arrays
- Efficiently sorting a numpy array in descending order?
- How to plot an array in python?
- TypeError: only integer arrays with one element can be converted to an index 3
- How to create a numpy array of all True or all False?
- How to create a numpy array of lists?
- Removing nan values from an array
- Root mean square of a function in python
- What are the differences between numpy arrays and matrices? Which one should I use?
- Numpy – add row to array
- Is there any numpy group by function?
- Counting array elements in Python
- Mean Squared Error in Numpy?
- How to normalize a NumPy array to within a certain range?
- numpy array concatenation error: 0-d arrays can’t be concatenated
- Convert a 1D array to a 2D array in numpy
- inverting image in Python with OpenCV
- How to print the full NumPy array, without truncation?
- Sorting arrays in NumPy by column
- How is Python’s List Implemented?
- Hashing arrays in Python
- Can I put a tuple into an array in python?
- Shuffle an array with python, randomize array item order with python
- How to use “raise” keyword in Python [duplicate]
- List changes unexpectedly after assignment. Why is this and how can I prevent it?
- ImportError: numpy.core.multiarray failed to import
- Index Error: list index out of range (Python) [duplicate]
- AttributeError: module ‘matplotlib’ has no attribute ‘plot’
- NameError: global name ‘xrange’ is not defined in Python 3
- What does “SyntaxError: Missing parentheses in call to ‘print'” mean in Python?
- SyntaxError: cannot assign to operator
- What is the difference between np.mean and tf.reduce_mean?
- How do I combine two dataframes?
- How can I get list of values from dict?
- How do I append one string to another in Python?
- AttributeError: ‘list’ object has no attribute ‘replace’ when trying to remove character
- How to sort a list of objects based on an attribute of the objects?
- How to convert bytearray to string in python
- Subtracting two lists in Python
- Is there any way to kill a Thread?
- BeautifulSoup getting href
- How to get row number in dataframe in Pandas?
- Difference between Python’s Generators and Iterators
- “Unorderable types: int() < str()"
- python : an integer is required (got type str)
- Django Rest Framework — no module named rest_framework
- Unsupported operation :not writeable python
- How to strip a specific word from a string?
- Printing subscript in python
- ImportError: No module named Cython.Distutils
- When to use %r instead of %s in Python? [duplicate]