foobar

file_handling.py

@@ -60,6 +60,7 @@
 file4.write("apple , banana , cherry , mango")
 content = file4.read()
 print(content)  #TODO debug here...
+file4.close()
 
 if os.path.exists("myfile"):
     os.remove("myfile")

file_handling_2.py

@@ -0,0 +1,71 @@
+# continued......
+
+file_1 = open('trial.txt',"r")
+s = file_1.readlines() # the readlines function reads the entire contents of the file into a list (here s)
+
+print(s)
+file_1.close
+
+## displaying the size and no of lines of a file 
+file_2 = open("trial.txt","r")
+foo = file_2.read()
+size = len(foo)
+linecount = len(file_2.readlines())
+print("size of the given file is ")
+print(size, "bytes")
+print("no of lines is ", linecount)
+file_2.close()
+
+## creating a file and holding data in it
+
+filenew = open("student.dat" , "w")
+No_of_stdnt = int(input("enter the no of students in class :"))
+for i in range(No_of_stdnt):
+    name = input("Enter the name of the studnet :")
+    roll = int(input("enter the roll no of the student :"))
+    Marks = int(input("eneter the marks obtained by the student :"))
+    data = str(roll) + "," + name + "," + str(Marks) + '\n'
+    filenew.write(data)
+
+    filenew.flush()  ## the flush functions use us defined below
+
+filenew.close()
+
+## reading the no of consonants and vowels from a file
+
+file1 = open("trial.txt","r") 
+ch = ""
+Vcount = 0
+Ccount = 0
+for ch in file1.read():
+    if ch in set("AEIOUaeiou"):
+        Vcount +=  1
+    elif ch in set("qwrtypsdfghjklzxcvbnmQWRTYPSDFGHJKLZXCVBNM"):
+        Ccount += 1
+
+print("Vowels in the file",Vcount)
+print("Consonants in the file",Ccount)
+
+file1.close()
+
+
+## the Flush function
+# the flush function is used to write data still pending in the buffer
+# the flush function is implicitly called by the close() function
+# but can also be called explicitly to force write the data
+# 
+
+
+# use of strip , rstrip , lstrip 
+## strip() = removes the character from both ends
+# lstrip() = removes the character from the left end
+# rstrip() = removes the character from the right end
+
+myfile = open("stripping.txt",'r+')
+text = myfile.read()
+text_stripped = text.lstrip('.,asd')
+print(text_stripped)
+
+myfile.close()
+
+

stripping.txt

@@ -0,0 +1 @@
+.........,,,,,asssdddd Hello World

student.dat

@@ -0,0 +1 @@
+3,sdsd,32