Added macro 1 and pass 1 code in testing branch. Code by Afan Shaikh.

Codes/macro 1.py

@@ -0,0 +1,54 @@
+#Original Code, Engineered by Afan Shaikh.
+try:
+    source= open('source.txt', 'r')
+    dum = source.readline()
+    print("File is read successfully.")
+    source.seek(0)
+except FileNotFoundError:
+    print('\n\n\nsource.txt file not found. Create it first!\n\n\n')
+except IOError:
+    print('The source file has an IO error')
+
+
+MDT =[]
+MNT =[]
+
+def macroman(line):
+    name = line.split()[1] #A concise way to get the 2nd word-> name of macro. index =1. first split and then get 2nd word
+    entry = []
+    entry.append(line.strip()) #append the macro definition line
+    while True:
+        line=source.readline().upper()
+        if not line:
+            print('No MEND found for: ', name)
+            return
+        if 'MACRO' in line:
+            macroman(line)
+        elif 'MEND' in line:
+            global MDT, MNT
+            entry.append(line.strip()) #MEND line appended too
+            MNT.append([len(MNT)+1, name, len(MDT)+1]) # Eg. 1 Fibo 50
+            MDT = MDT + entry
+            return
+        else:
+            entry.append(line.strip())
+        
+
+def driver():
+    global MDT, MNT
+    while True:
+        line = source.readline().upper()
+        if not line:break
+        if 'MACRO' in line:
+            macroman(line)
+    print('\nMNT:')
+    for a in MNT:
+        print(a)
+    print('\n\nMDT:')
+    i=0
+    for a in MDT:
+        i=i+1
+        print (i, ' ',a)
+
+driver()
+

Codes/pass 1.py

@@ -0,0 +1,110 @@
+#Original Code, Engineered by Afan Shaikh. no AI.
+try:
+    source = open('source.txt','r')
+    data = source.read()
+    print('File read successfully bro \n\n')
+    source.seek(0)
+except FileNotFoundError: #A little bit of exception handling
+    print('\n\n\nFile Not found. Create a source.txt first! u dummy!\n\n\n ')
+except IOError:
+    print('There was an IO error')
+LT_index = 0 #index of LT table
+ST_index = 0 #index of ST table
+add = 0 # address in source code
+MOT = {'STOP': '00','ADD': '01','SUB': '02','MULT': '03','MOVER': '04','MOVEM': '05','COMP': '06','BC': '07','DIV': '08','READ': '09','PRINT': '10','START': '01','END': '02','ORIGIN': '03','LTORG': '05','DS': '01','DC': '02','AREG,': '01','BREG,': '02','EQ':'01'}
+ST = []
+code=[]
+LT=[]
+MC = []
+# LT, ST are lists of lists. code= intermediate code table
+
+
+def classy(text):
+    '''This function will return the class of the word to be inputted in the Intermediate table'''
+    text = text.upper()
+    if text in ['STOP','ADD','SUB', 'MULT','MOVER','MOVEM','COMP','BC','DIV','READ', 'PRINT']:
+        return 'IS'
+    elif text in ['START','END','ORIGIN','LTORG']:
+        return 'AD'
+    elif text in ['DS','DC']:
+        return 'DL'
+    elif text in ['AREG,','BREG,']: return 'RG'
+    elif text in ['EQ']: return 'CC'
+    else: return 'None'
+
+def handle_start():
+    '''This function gives you the starting address of the code'''
+    line= source.readline()
+    words=line.split()
+    if words[0].upper()=='START':
+        return int(words[1])
+    else: 
+        print("No Start Statement! Abort!\n")
+        return 0
+
+
+
+def pass1():
+    add=handle_start()
+    if not add:
+        print("Ending Pass 1 due to Above error.")
+        return
+    global ST_index, LT_index  # to modify global variables, use global keyword
+    while True:
+        line=source.readline()# handlestart function reads line 1 and we start from the second line.
+        if not line:
+            break
+        words= line.split()
+        for w in words:
+            w=w.upper()
+            if w[0]=='=':
+                entry=[LT_index,w, add]
+                LT.append(entry)
+                LT_index +=1 
+            elif classy(w)== 'None':
+                for term in ST:
+                    if w== term[1]: break # I check if the label is already present in ST.
+                else:
+                    entry=[ST_index,w, add]
+                    ST.append(entry)
+                    ST_index +=1
+        add+=1
+    print('LT:')
+    for a in LT:
+        print(a)
+    print('\n\n\nST:')
+    for a in ST:
+        print(a)
+        
+def intermediate():
+    source.seek(0)
+    while True:
+        entry=[]
+        ind = 0
+        line=source.readline()
+        if not line:
+            break
+        words=line.split()
+        for w in words:
+            w=w.upper()
+            if classy(w)!='None': #it is a directive
+                entry.append((classy(w),MOT[w]))
+            elif w[0]== '=': #it is a literal.
+                for a in LT:
+                    if a[1]==w:
+                        ind = a[0]
+                        break
+                entry.append(('L',ind))
+            else: #it is a symbol
+                for a in ST:
+                    if a[1]==w:
+                        ind = a[0]
+                        break
+                entry.append(('S',ind))
+        code.append(entry)
+    print("\nThe Intermediate code is:")
+    for entry in code:
+        print(entry)
+
+pass1()
+intermediate()

Codes/source (macro).txt

@@ -0,0 +1,11 @@
+macro add
+a1
+maCro sub
+s1
+s2
+s3
+mend
+a2
+mend
+These lines should not come in MNT
+help haha aha

Codes/source (pass1).txt

@@ -0,0 +1,4 @@
+Start 100
+Label MOVER AREG, =5
+add areg, =999
+sub breg, x