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Author: suneelpatel

Module8_File_Operations/File Operation.py

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+
+#======================= Operation on .txt file ============================
+
+#import os
+
+import os
+
+os.getcwd() # Check current directory location
+
+#Set the directory 
+os.chdir('D:\\AA-SUNIL\\PROGRAMING AND DATABASE\\Programming\\Python\\My_Practice\\Program')
+
+#Read .txt file 
+newfile = open("C:\\Users\\HP\\Spyder\\Python_py.txt", "w+")
+
+for i in range(1,10):
+    print(i)
+    newfile.write("\n Hello, Welcome to Python:") #Write in the file
+
+newfile.close() #Close file
+
+newfile = open("Python_Py.txt","r")
+
+for i in range(1, 10):
+    print(newfile.read())
+    break
+
+newfile.close()
+
+
+# File methods
+
+os.rename("Python_Py.txt","Python2.txt")
+
+os.remove("Python2.txt")
+
+os.listdir(os.getcwd())
+
+os.mkdir('new')
+
+os.chdir('C:\\Users\\SUNEEL PATEL\\Desktop\\py\\D3') 
+
+
+#2.===================== Operation on .csv files =============================
+
+fp = open("USArrests.csv", "r")
+for line in fp:
+    print(line)
+    
+print(fp.read())
+fp.close()
+
+
+import codecs
+
+fp = codecs.open(os.path.join('C:\\Users\\SUNEEL PATEL\\Desktop\\py\\D2','worldcities.csv'), 'r')
+cnt = 0
+for line in fp:
+    print (cnt)
+    if cnt <= 10:
+        print(line)
+    else:
+        break
+    cnt += 1
+fp.close()
+
+
+os.rename('C:\\Users\\NAEEN REDDY\\Desktop\\py\\D2\\worldcities.csv', 
+          os.path.join('C:\\Users\\SUNEEL PATEL\\Desktop\\','County.csv'))
+
+
+
+wp = open(os.path.join('C:\\Users\\SUNEEL PATEL\\Desktop\\py\\D2\\', 'counry.DAT'), 'w')
+
+rp = open(os.path.join('C:\\Users\\SUNEEL PATEL\\Desktop\\py\\D2','worldcities.csv'), 'r')
+cnt = 0
+for line in rp:
+    if cnt <= 10:
+        wp.write(line)
+        wp.write('\n')
+    else:
+        break
+    cnt += 1
+rp.close()
+wp.close()
+
+
+for line in reversed(list(open(os.path.join('C:\\Users\\NAEEN REDDY\\Desktop\\py\\D2','worldcities.csv'), 'r'))):
+    print(line.rstrip())
+
+
+
+
+d1 = {'fname': 'Steve', 'lname': 'Jobs'}
+d2 = {'fname': 'Steve', 'lname': 'Jobs', 'age': 21}
+
+import json
+wp = open(os.path.join('C:\\Users\\SUNEEL PATEL\\Desktop\\py\\D2', 'test_new.json'), 'w+')
+for x in range(3):
+    if x == 0:
+        wp.write(json.dumps(d1))
+    elif x == 1:
+        wp.write(json.dumps(d2))
+    else:
+        wp.write(json.dumps({'age':24, 'salary':10000}))
+    wp.write('\n')
+wp.close()
+
+
+
+#import json
+wp = open(os.path.join('C:\\Users\\SUNEEL PATEL\\Desktop\\py\\D2', 'test_new.json'), 'w+')
+for x in range(5):
+    if x == 0:
+        wp.write(json.dumps(d1))
+    elif x == 1:
+        wp.write(json.dumps(d2))
+    else:
+        wp.write(json.dumps({'age':24, 'salary':10000}))
+    wp.write('\n')
+wp.close()
+
+
+
+#import json
+rp = open(os.path.join('C:\\Users\\SUNEEL PATEL\\Desktop\\py\\D2', 'test_new.json'), 'r')
+# content = json.loads(rp.read())
+for line in rp:
+    #print(line)
+    rec = json.loads(line)
+    #print(rec, type(rec))
+    print(rec.get('salary', 'Not found'))
+    
+rp.close()
+
+
+
+# d1['key'] and d1[key]
+path = os.path.join('C:\\Users\\SUNEEL PATEL\\Desktop\\py\\D2', 'test_new.json')
+print(path)
+
+
+os.path.exists(os.path.join('Misc/old', 'test.json'))
+
+
+os.path.exists(os.path.join('C:\\Users\\SUNEEL PATEL\\Desktop\\py\\D2', 'test_new.json'))
+
+#==============================================================================
+
+"""
+Suneel Patel - Data Scientist for Nation, Society and Humanity
+
+Learn & Teach - Online Training Platform
+
+Email: [email protected]   |   M.No: +91-7771007070
+Follow on LinkedIn : https://www.linkedin.com/in/suneelpatel/
+Twitter: https://twitter.com/sunilpatel18
+
+"""