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refactored path discussion in intro to python 04 to use pathlib #187

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mnfienen merged 1 commit into from
Sep 25, 2025
Merged

refactored path discussion in intro to python 04 to use pathlib #187

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13 changes: 6 additions & 7 deletions notebooks/part0_python_intro/04_files_and_strings.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -245,7 +245,7 @@
"\n",
"Files on non-volatile storage media are organized by a set of rules known as a **file system**. File systems are made up of files and **directories**, which are containers for both files and other directories.\n",
"\n",
"By default, when we create a new file by opening it goes in the current directory (wherever we were when we ran the program). Similarly, when we open a file for reading, Python looks for it in the current directory. In the above example, we have used `os.path.join()` to write the file to a specific directory rather than the directory we are running this notebook from. If `'test.txt'` was used in the `open` statement, the file would have been written to the current working directory. The current working directory can be determined using:"
"By default, when we create a new file by opening it goes in the current directory (wherever we were when we ran the program). Similarly, when we open a file for reading, Python looks for it in the current directory. In the above example, we have used `pathlib.Path` to write the file to a specific directory rather than the directory we are running this notebook from. If `'test.txt'` was used in the `open` statement, the file would have been written to the current working directory. The current working directory can be determined using:"
]
},
{
Expand All @@ -255,9 +255,7 @@
"metadata": {},
"outputs": [],
"source": [
"# The os module used to be the preferred way to access\n",
"# the current working directory; now we use pathlib\n",
"# os.getcwd()\n",
"# the pathlib Path object can be used to find the current working directory\n",
"\n",
"cwd = Path.cwd()\n",
"print(cwd)"
Expand All @@ -268,7 +266,7 @@
"id": "3a60f550",
"metadata": {},
"source": [
"Determine the directory that we wrote `'test.txt'` (`fname`) to in the blank code block below using `os.path.abspath()`:"
"Determine the directory that we wrote `'test.txt'` (`fname`) to in the blank code block below using `<Path>.resolve()` where `Path` indicates the `pathlib.Path` object:"
]
},
{
Expand All @@ -278,7 +276,6 @@
"metadata": {},
"outputs": [],
"source": [
"# os.path.abspath(fname)\n",
"print(fname)\n",
"\n",
"# to get the absolute path using pathlib, we use .resolve()\n",
Expand All @@ -296,7 +293,9 @@
"\n",
"`os.path` includes a number of useful methods for manipulating pathnames. For example, `os.path.normpath(path)` can be used to take Unix style paths into paths that can be used with Windows.\n",
"\n",
"Take a look at https://docs.python.org/3.9/library/os.path.html for more information of `os.path` methods."
"Take a look at https://docs.python.org/3.9/library/os.path.html for more information on `os.path` methods or https://docs.python.org/3/library/pathlib.html for more information on `pathlib.Path`.\n",
"\n",
"Alternatively, `pathlib.Path` stores and operates on paths in a operating-system-agnostic way."
]
},
{
Expand Down
13 changes: 6 additions & 7 deletions notebooks/part0_python_intro/solutions/04_files_and_strings.ipynb
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Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -339,7 +339,7 @@
"\n",
"Files on non-volatile storage media are organized by a set of rules known as a **file system**. File systems are made up of files and **directories**, which are containers for both files and other directories.\n",
"\n",
"By default, when we create a new file by opening it goes in the current directory (wherever we were when we ran the program). Similarly, when we open a file for reading, Python looks for it in the current directory. In the above example, we have used `os.path.join()` to write the file to a specific directory rather than the directory we are running this notebook from. If `'test.txt'` was used in the `open` statement, the file would have been written to the current working directory. The current working directory can be determined using:"
"By default, when we create a new file by opening it goes in the current directory (wherever we were when we ran the program). Similarly, when we open a file for reading, Python looks for it in the current directory. In the above example, we have used `pathlib.Path` to write the file to a specific directory rather than the directory we are running this notebook from. If `'test.txt'` was used in the `open` statement, the file would have been written to the current working directory. The current working directory can be determined using:"
]
},
{
Expand All @@ -357,9 +357,7 @@
}
],
"source": [
"# The os module used to be the preferred way to access\n",
"# the current working directory; now we use pathlib\n",
"# os.getcwd()\n",
"# the pathlib Path object can be used to find the current working directory\n",
"\n",
"cwd = Path.cwd()\n",
"print(cwd)"
Expand All @@ -370,7 +368,7 @@
"id": "3a60f550",
"metadata": {},
"source": [
"Determine the directory that we wrote `'test.txt'` (`fname`) to in the blank code block below using `os.path.abspath()`:"
"Determine the directory that we wrote `'test.txt'` (`fname`) to in the blank code block below using `<Path>.resolve()` where `Path` indicates the `pathlib.Path` object:"
]
},
{
Expand All @@ -389,7 +387,6 @@
}
],
"source": [
"# os.path.abspath(fname)\n",
"print(fname)\n",
"\n",
"# to get the absolute path using pathlib, we use .resolve()\n",
Expand All @@ -407,7 +404,9 @@
"\n",
"`os.path` includes a number of useful methods for manipulating pathnames. For example, `os.path.normpath(path)` can be used to take Unix style paths into paths that can be used with Windows.\n",
"\n",
"Take a look at https://docs.python.org/3.9/library/os.path.html for more information of `os.path` methods."
"Take a look at https://docs.python.org/3.9/library/os.path.html for more information on `os.path` methods or https://docs.python.org/3/library/pathlib.html for more information on `pathlib.Path`.\n",
"\n",
"Alternatively, `pathlib.Path` stores and operates on paths in a operating-system-agnostic way."
]
},
{
Expand Down
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