Difference between import numpy and import numpy as np

numpy is the top package name, and doing import numpy doesn’t import submodule numpy.f2py.

When you do import numpy it creats a link that points to numpy, but numpy is not further linked to f2py. The link is established when you do import numpy.f2py

In your above code:

import numpy as np # np is an alias pointing to numpy, but at this point numpy is not linked to numpy.f2py
import numpy.f2py as myf2py # this command makes numpy link to numpy.f2py. myf2py is another alias pointing to numpy.f2py as well

Here is the difference between import numpy.f2py and import numpy.f2py as myf2py:

  • import numpy.f2py
    • put numpy into local symbol table(pointing to numpy), and numpy is linked to numpy.f2py
    • both numpy and numpy.f2py are accessible
  • import numpy.f2py as myf2py
    • put my2py into local symbol table(pointing to numpy.f2py)
    • Its parent numpy is not added into local symbol table. Therefore you can not access numpy directly

Related Posts:

  1. ImportError: DLL load failed: The specified module could not be found
  2. numpy max vs amax vs maximum
  3. What is the purpose of meshgrid in Python / NumPy?
  4. why numpy.ndarray is object is not callable in my simple for python loop
  5. numpy division with RuntimeWarning: invalid value encountered in double_scalars
  6. How to fix ‘Object arrays cannot be loaded when allow_pickle=False’ for imdb.load_data() function?
  7. How do I create an empty array/matrix in NumPy?
  8. Most efficient way to find mode in numpy array
  9. numpy matrix vector multiplication
  10. Converting list to numpy array
  11. How do I read CSV data into a record array in NumPy?
  12. data type not understood
  13. How do I read CSV data into a record array in NumPy?
  14. How to normalize a NumPy array to a unit vector?
  15. ImportError: numpy.core.multiarray failed to import
  16. ImportError: Missing required dependencies [‘numpy’]
  17. ImportError: numpy.core.multiarray failed to import
  18. size of NumPy array
  19. numpy array concatenate: “ValueError: all the input arrays must have same number of dimensions”
  20. TypeError: ‘numpy.float64’ object is not callable
  21. Convert a tensor to numpy array in Tensorflow?
  22. Convert a tensor to numpy array in Tensorflow?
  23. Using Numpy Vectorize on Functions that Return Vectors
  24. Use a.any() or a.all()
  25. TypeError: ‘numpy.float64’ object is not callable?
  26. ‘DataFrame’ object has no attribute ‘sort’
  27. How to normalize a NumPy array to a unit vector?
  28. convert nan value to zero
  29. How can I upgrade NumPy?
  30. Most efficient way to map function over numpy array
  31. Is there a NumPy function to return the first index of something in an array?
  32. How to get element-wise matrix multiplication (Hadamard product) in numpy?
  33. Numpy/Python Array Value error
  34. What is dtype(‘O’), in pandas?
  35. ValueError: could not broadcast input array from shape (224,224,3) into shape (224,224)
  36. TypeError: ‘DataFrame’ object is not callable
  37. Overflow Error in Python’s numpy.exp function
  38. Cannot convert list to array: ValueError: only one element tensors can be converted to Python scalars
  39. ValueError: ‘object too deep for desired array’
  40. Calculating Covariance with Python and Numpy
  41. LinAlgError: Last 2 dimensions of the array must be square
  42. Dump a NumPy array into a csv file
  43. What does axis in pandas mean?
  44. Pytorch tensor to numpy array
  45. Inverse of a matrix using numpy
  46. ‘numpy.float64’ object is not iterable
  47. Python: slicing a multi-dimensional array
  48. Normalize data in pandas
  49. Can’t broadcast input array from shape (3,1) into shape (3,)
  50. 3-dimensional array in numpy
  51. How do I calculate percentiles with python/numpy?
  52. deleting rows in numpy array
  53. How do you get the magnitude of a vector in Numpy?
  54. ‘list’ object has no attribute ‘shape’
  55. What is the difference between np.mean and tf.reduce_mean?
  56. How to calculate rolling / moving average using python + NumPy / SciPy?
  57. ValueError: object too deep for desired array while using convolution
  58. Make list of arrays in python
  59. Import Error: No module named numpy Anaconda
  60. What does ‘index 0 is out of bounds for axis 0 with size 0’ mean?
  61. What does ‘index 0 is out of bounds for axis 0 with size 0’ mean?
  62. pandas create new column based on values from other columns / apply a function of multiple columns, row-wise
  63. Moving average or running mean
  64. ValueError: x and y must be the same size
  65. Saving a Numpy array as an image
  66. NumPy List Comprehension Syntax
  67. Linear regression with matplotlib / numpy
  68. How to get the unit vector from a numpy array
  69. Numpy extract submatrix
  70. RuntimeError: module compiled against API version a but this version of numpy is 9
  71. numpy-equivalent of list.pop?
  72. Using numpy to build an array of all combinations of two arrays
  73. Can’t update to numpy 1.13 with anaconda?
  74. Matplotlib: TypeError: can’t multiply sequence by non-int of type ‘numpy.float64’
  75. Efficiently sorting a numpy array in descending order?
  76. TypeError: only integer arrays with one element can be converted to an index 3
  77. How to add column to numpy array
  78. How to fix ‘RuntimeWarning: divide by zero encountered in double_scalars’
  79. Numpy, multiply array with scalar
  80. Python 3: Multiply a vector by a matrix without NumPy
  81. IndexError: index 2 is out of bounds for axis 0 with size 2
  82. How to add a new row to an empty numpy array
  83. Coalesce values from 2 columns into a single column in a pandas dataframe
  84. Compute a confidence interval from sample data
  85. Numpy – add row to array
  86. How do I compute derivative using Numpy?
  87. ImportError: cannot import name NUMPY_MKL
  88. built-in range or numpy.arange: which is more efficient?
  89. Is there any numpy group by function?
  90. Mean Squared Error in Numpy?
  91. Is there a head and tail method for Numpy array?
  92. Difference between data type ‘datetime64[ns]’ and ‘
  93. Merging two DataFrames
  94. Convert a 1D array to a 2D array in numpy
  95. inverting image in Python with OpenCV
  96. How to print the full NumPy array, without truncation?
  97. Transposing a 1D NumPy array
  98. numpy.float64 object is not iterable…but I’m NOT trying to
  99. vectorize conditional assignment in pandas dataframe
  100. Python OpenCV2 (cv2) wrapper to get image size?

Leave a Comment