Initial commit

python/Input_Output/Python program to append text to a file and display the text.py

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+def file_read(fname):  
+        from itertools import islice  
+        with open(fname, "w") as myfile:  
+                myfile.write("Python Exercises\n")  
+                myfile.write("Java Exercises")  
+        txt = open(fname)  
+        print(txt.read())  
+file_read('abc.txt')  

python/Input_Output/Python program to count the frequency of words in a file.py

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+from collections import Counter  
+def word_count(fname):  
+        with open(fname) as f:  
+                return Counter(f.read().split())  
+  
+print("Number of words in the file :",word_count("test.txt"))

python/Input_Output/Python program to count the number of lines in a text file.py

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+def file_lengthy(fname):  
+        with open(fname) as f:  
+                for i, l in enumerate(f):  
+                        pass  
+        return i + 1  
+print("Number of lines in the file: ",file_lengthy("test.txt"))

python/Input_Output/Python program to find the longest words.py

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+def longest_word(filename):  
+    with open(filename, 'r') as infile:  
+              words = infile.read().split()  
+    max_len = len(max(words, key=len))  
+    return [word for word in words if len(word) == max_len]  
+  
+print(longest_word('test.txt')) 

python/Input_Output/Python program to get the file size of a plain file.py

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+def file_size(fname):  
+        import os  
+        statinfo = os.stat(fname)  
+        return statinfo.st_size  
+  
+print("File size in bytes of a plain file: ",file_size("test.txt"))  

python/Input_Output/Python program to read a file line by line and store it into a list.py

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+def file_read(fname):  
+        with open(fname) as f:  
+                #Content_list is the list that contains the read lines.       
+                content_list = f.readlines()  
+                print(content_list)  
+  
+file_read(\'test.txt\')  

python/Input_Output/Python program to read a file line by line store it into a variable.py

@@ -0,0 +1,5 @@
+def file_read(fname):  
+        with open (fname, "r") as myfile:  
+                data=myfile.readlines()  
+                print(data)  
+file_read('test.txt')  

python/Input_Output/Python program to read a file line by line store it into an array.py

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+def file_read(fname):  
+        content_array = []  
+        with open(fname) as f:  
+                #Content_list is the list that contains the read lines.       
+                for line in f:  
+                        content_array.append(line)  
+                print(content_array)  
+  
+file_read('test.txt') 

python/Input_Output/Python program to read an entire text file.py

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+def file_read(fname):  
+        txt = open(fname)  
+        print(txt.read())  
+  
+file_read('test.txt')  

python/Input_Output/Python program to read first n lines of a file.py

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+def file_read_from_head(fname, nlines):  
+        from itertools import islice  
+        with open(fname) as f:  
+                for line in islice(f, nlines):  
+                        print(line)  
+file_read_from_head('test.txt',2)  

python/Input_Output/Python program to read last n lines of a file.py

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+import sys  
+import os  
+def file_read_from_tail(fname,lines):  
+        bufsize = 8192  
+        fsize = os.stat(fname).st_size  
+        iter = 0  
+        with open(fname) as f:  
+                if bufsize > fsize:  
+                        bufsize = fsize-1  
+                        data = []  
+                        while True:  
+                                iter +=1  
+                                f.seek(fsize-bufsize*iter)  
+                                data.extend(f.readlines())  
+                                if len(data) >= lines or f.tell() == 0:  
+                                        print(''.join(data[-lines:]))  
+                                        break  
+  
+file_read_from_tail('test.txt',2)  

python/Input_Output/Python program to write a list content to a file.py

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+color = ['Red', 'Green', 'White', 'Black', 'Pink', 'Yellow']  
+with open('abc.txt', "w") as myfile:  
+        for c in color:  
+                myfile.write("%s\n" % c)  
+  
+content = open('abc.txt')  
+print(content.read())