From 42c6b97062133615720140f4d221dce6c28be32a Mon Sep 17 00:00:00 2001
From: PShivani07 <31812153+PShivani07@users.noreply.github.com>
Date: Thu, 24 May 2018 02:42:55 +0530
Subject: [PATCH] Create assignment_4

---
 .../Week-4/ShivaniP/assignment_4              | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 Introduction-to-Data-Science/Week-4/ShivaniP/assignment_4

diff --git a/Introduction-to-Data-Science/Week-4/ShivaniP/assignment_4 b/Introduction-to-Data-Science/Week-4/ShivaniP/assignment_4
new file mode 100644
index 0000000..92682f5
--- /dev/null
+++ b/Introduction-to-Data-Science/Week-4/ShivaniP/assignment_4
@@ -0,0 +1,35 @@
+1.ab+ mode opens a file for appending and reading in binary format.The file pointer is at the end of the file.
+
+2.While reading the file, the data in the file is transfered in an intermediate buffer before it is accessed by 
+python.This buffer signifies the size of the buffer used.
+
+3.
+   try:
+        a=1/0   #ZeroDivisionError
+        fh=open("python.txt",r)   
+        fh.readline()  #IOError
+        b=12
+   if(b>0)
+   print("greater than zero")  #IndentationError
+   if(c>b)
+         print("c greater than b")  #NameError
+   except IOError:
+        print("file not found!!!")
+   except ZeroDivisionError:
+        print("division by zero!!")
+   except NameError:
+        print("identifier not found!!!")
+
+4.
+file=open("file.txt",r+)
+list=[]
+file.seek(0,2)
+pos=file.tell()
+k=0
+file.seek(0,0)
+while k!=pos:
+      list.append(file.readline())
+      k=file.tell()
+file.close()
+for i in range(len(list),0,-1):
+        print(list[i])