Python common error messages -TypeError-str conv

TypeError: not all arguments converted during string formatting

In following python code, a bug is intentionally left to generate a Python error message :-
import sys
class tables:
   def __init__(self,w):
       # 2.4 Definitions of tables for the FSM
       ans = self.T0_r(w)
       print "Result =" % (ans)
    
    def T0_r(self, w):
       self.tables_ls()
       self.w = w
       self.s1_t0_r = self.T0[self.w]
       return self.s1_t0_r
   
    def tables_ls(self):    
        self.T0 = ['0xFF563C6' ,'0x84FF7CF8' ,'0x897788EE' ,'0x8EFB7BF6',
               '0xFE2F2FF ' ,'0xBCAF6BD6' ,'0xAA6F6FDE' ,'0xFFC5C591']

def main ():
   # Read 0 elemant of the table array by calling class
   y = tables(0x4)
main()
 
Error message from above Python code:-
Traceback (most recent call last):
 
  File "calling_classes.py", line 28, in ?
   main()
 File "calling_classes.py", line 26, in main
   y = tables(0x4)
 File "calling_classes.py", line 12, in __init__
   print "Result =" % (ans)

ypeError: not all arguments
Solution

Instead off
print "Result =" % (ans)
use
print "Result =%s" % (ans)

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Digital fundamentals.

Interview Questions.

Following list of programs are discussed in this sec:

¶ File Operations: 

Tutorials @fullchipdesign.com

Verilog Tutorial.

LTE Tutorial.

Memory Tutorial.

  • Open and read file from within the python program as a single string. Command line arguments lists as string with ‘sys.argv’.
  • Use of  glob module in Python code . Read file using classes, global variables and functions. Program to open and write file.
  • ¶ Program to read file, filter text, conversion to HEX, conversion from Hexadecimal to Signed Magnitude.S Steps for conditional statements, converting string to hexadecimalvalue, strip of white space at end, converting 12 bit hexadecimal values to 12 bit signed values.

    ¶ Advanced python code to cover UNIX shell commands, read lines from a text file, ‘sysargv’ command line operations, use of class and multiple functions. 

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