Started Python a week ago and I have some questions to ask about reading and writing to the same files. I've gone through some tutorials online but I am still confused about it. I can understand simple read and write files.

openFile = open("filepath", "r")
readFile = openFile.read()
print readFile 

openFile = open("filepath", "a")
appendFile = openFile.write("\nTest 123")

openFile.close()

But, if I try the following I get a bunch of unknown text in the text file I am writing to. Can anyone explain why I am getting such errors and why I cannot use the same openFile object the way shown below.

# I get an error when I use the codes below:       
openFile = open("filepath", "r+")
writeFile = openFile.write("Test abc")

readFile = openFile.read()
print readFile

openFile.close()

I will try to clarify my problems. In the example above, openFile is the object used to open file. I have no problems if I want write to it the first time. If I want to use the same openFile to read files or append something to it. It doesn't happen or an error is given. I have to declare the same/different open file object before I can perform another read/write action to the same file.

#I have no problems if I do this:    
openFile = open("filepath", "r+")
writeFile = openFile.write("Test abc")

openFile2 = open("filepath", "r+")
readFile = openFile2.read()
print readFile

openFile.close()

I will be grateful if anyone can tell me what I did wrong here or is it just a Pythong thing. I am using Python 2.7. Thanks!

I have some simple, working code to read and write files:

openFile = open("filepath", "r")
readFile = openFile.read()
print(readFile)

openFile = open("filepath", "a")
appendFile = openFile.write("\nTest 123")

openFile.close()

But, if I try to read and write the same file, I get errors, or the resulting text is not what I expect. For example:

# I get an error when I use the codes below:       
openFile = open("filepath", "r+")
writeFile = openFile.write("Test abc")

readFile = openFile.read()
print(readFile)

openFile.close()

Why can't I write the code this way? It seems to work if I use a separate open call for the same file:

#I have no problems if I do this:    
openFile = open("filepath", "r+")
writeFile = openFile.write("Test abc")

openFile2 = open("filepath", "r+")
readFile = openFile2.read()
print(readFile)

openFile.close()

Started Python a week ago and I have some questions to ask about reading and writing to the same files. I've gone through some tutorials online but I am still confused about it. I can understand simple read and write files.

openFile = open("filepath", "r")
readFile = openFile.read()
print readFile 

openFile = open("filepath", "a")
appendFile = openFile.write("\nTest 123")

openFile.close()

But, if I try the following I get a bunch of unknown text in the text file I am writing to. Can anyone explain why I am getting such errors and why I cannot use the same openFile object the way shown below.

openFile = open("filepath", "r+")
writeFile = openFile.write("Test abc")

readFile = openFile.read()
print readFile

openFile.close()

Thanks!

Started Python a week ago and I have some questions to ask about reading and writing to the same files. I've gone through some tutorials online but I am still confused about it. I can understand simple read and write files.

openFile = open("filepath", "r")
readFile = openFile.read()
print readFile 

openFile = open("filepath", "a")
appendFile = openFile.write("\nTest 123")

openFile.close()

But, if I try the following I get a bunch of unknown text in the text file I am writing to. Can anyone explain why I am getting such errors and why I cannot use the same openFile object the way shown below.

# I get an error when I use the codes below:       
openFile = open("filepath", "r+")
writeFile = openFile.write("Test abc")

readFile = openFile.read()
print readFile

openFile.close()

I will try to clarify my problems. In the example above, openFile is the object used to open file. I have no problems if I want write to it the first time. If I want to use the same openFile to read files or append something to it. It doesn't happen or an error is given. I have to declare the same/different open file object before I can perform another read/write action to the same file.

#I have no problems if I do this:    
openFile = open("filepath", "r+")
writeFile = openFile.write("Test abc")

openFile2 = open("filepath", "r+")
readFile = openFile2.read()
print readFile

openFile.close()

I will be grateful if anyone can tell me what I did wrong here or is it just a Pythong thing. I am using Python 2.7. Thanks!