You can create a 1-dimensional numpy array in Python using the numpy.array() function. Here's an example: 

import numpy as np

# create a 1-dimensional numpy array from a list of integers
arr = np.array([1, 2, 3, 4, 5])

# print the array
print(arr)

Output: 

[1 2 3 4 5]

In this example, we first imported the numpy module using the import statement and then used the np.array() function to create a 1-dimensional numpy array. We passed a list of integers [1, 2, 3, 4, 5] to the function to create the array.

You can also create a 1-dimensional numpy array using other data types like floats or strings by passing them in a list to the np.array() function.