Statistical Algorithms Importer: Python Project FAQ

F.A.Q. of Statistical Algorithms Importer (SAI), here are common mistakes we have found in Python Project.

How to use the input file parameters

For example we consider Phonebook algorithm:

Phonebook, SAI

Phonebook, SAI

Phonebook, SAI

DataMiner show the Phonebook algorithm in this way:

Phonebook in DataMiner interface, SAI

Python script code in sample:

#
# author Giancarlo Panichi
#
# Phonebook
# 
import sys
import string
 
def print_numbers(numbers):
    print "Telephone Numbers:"
    for x in numbers.keys():
        value="Name: "+x+" Number: "+numbers[x]
        print value,
 
def lookup_number(numbers,name):
    if numbers.has_key(name):
        return "For "+name+" the number is "+numbers[name]
    else:
        return "For "+name+" was not found"
 
def load_numbers(numbers,filename):
    with open(filename,"r") as f:
        for in_line in f:            
            [name,number] = string.split(in_line,",")
            numbers[name] = number
 
def save_result(result,filename):
    with open(filename,"w") as f:
        f.write(result)
 
phonebookFile=sys.argv[1] 
name=sys.argv[2]
phone_list = {}
 
load_numbers(phone_list,phonebookFile)
print_numbers(phone_list)
number=lookup_number(phone_list,name)
print number
save_result(number,"result.txt")

phonebook.csv:

Giancarlo,0123456789
Gianpaolo,9876541234
Paolo,1231410414

phonebook result with Giancarlo:

For Giancarlo the number is 0123456789

Phonebook code:

File:Phonebook.zip

Matplotlib

Matplotlib require the $DISPLAY environment variable which means a running X server. DataMiner service do not allow a running X server session. So your code must be modified:

#
# author Giancarlo Panichi
#
# Write file image.png
# 
import matplotlib as mpl
mpl.use('Agg')
import matplotlib.pyplot as plt
import numpy as np
....
plt.imshow(image)
plt.savefig('image.png')

Urllib

On DataMiner services is installed Urllib3, see:

• http://urllib3.readthedocs.io/en/latest/user-guide.html

import urllib3
http = urllib3.PoolManager()
r = http.request('GET', 'http://httpbin.org/robots.txt')
print(r.status)
print(r.data)