convert code from perl to python for table handling-CodePudding

I have this code in perl that allows me to create a list of 8 to 1 and to create a numbering table. the array is filled by adding to the list data (i.e. 8 to 1) before a "suffix" which is 1. i.e. inside the array we will have numrotation [1.8, 1.7, 1.6, 1.5, 1.4, 1.3, 1.2, 1.1]. then fill the array with the values of 1 ..15 and 15.1 15.2 15.3 and 16..32

I would like to know which function can replace the push functions. I put you the code in perl and my test in python which did not : code in perl :

for ( reverse( 1 .. 8 ) ) { push @Numerotation, '1.' . $_ }         push
@Numerotation, ( 1 .. 15, 15.1, 15.2, 15.3, 16 .. 31, 34 .. 45 );

code in python (does not work) :

import numpy as np 

lst = list(range(1,8 1)) 
lst.reverse() 
print(lst) 
numerotation= np.array()

for i in lst :      
    d=1. i
    numerotation.append(d) 

print(numerotation)

CodePudding user response：

Since you are using numpy you can't do an append directly on the array like you can with regular Python lists. Instead you need to use the class function append(). Also since np.array() requires input you need to use np.empty(0) to create an empty array.

import numpy as np

lst = list(range(1, 8 1))
lst.reverse()
print(lst)
numerotation = np.empty(0)

for i in lst :
    d = "1."   str(i)
    numerotation = np.append(numerotation, d)

print(numerotation)

In your Perl code you create the floats as strings so I left them that way in this example. To make them numbers you need to convert them using float(d).

Here is another approach that uses a regular Python list and then creates a numpy array from it.

import numpy as np

lst = list(range(1, 8 1))
lst.reverse()
print(lst)
numbers = ["1."   str(i) for i in lst]

numerotation = np.array(numbers)

print(numerotation)