print(out)

```

We can also use `with` statement to contain operations on the file within a block.

Note that we used `a+` mode (standing for append+ mode) to allow appending new content at the end of the file and enable reading at the same time.

There are even [more modes](https://www.geeksforgeeks.org/reading-writing-text-files-python/) you could set when openning the file.

The trick is to check where the pointer is set: if the pointer is set at the end of the file `seek` method is needed to go back to the start of the file.

Here we set `file.seek(0)` to move the pointer back to the first line (line 0) of the file.

We can also use `with` statement to contain operations on the file within a block for clarity and cleanness.

```{code-cell} python3

with open('newfile.txt', 'a+') as file:

# Adding a line at the end

file.write('\nAdding a new line')

# Move the pointer back to the top

file.seek(0)

lines = file.readlines()

i = 0

for line in lines:

# Read the file line-by-line from the first line

for i, line in enumerate(file):

print(f'Line {i}: {line}')

i += 1

```

Note that we used `a+` mode (standing for append+ mode) to allow appending new content at the end of the file and enable reading at the same time.

There are [many modes](https://www.geeksforgeeks.org/reading-writing-text-files-python/) you could set when opening the file.

When experimenting with different modes, it is important to check where the pointer is set.

The pointer is set to the end of the file in `a+` mode.

Here we set `file.seek(0)` to move the pointer back to the first line (line 0) of the file to print the whole file.

### Paths

```{index} single: Python; Paths