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✎ weather.py

± weather.py

1"""Print the current temperature for a city."""

2import json

3import os

4import sys

5import urllib.request

6

7API = "https://api.openweathermap.org/data/2.5/weather"

8

9

10def fetch_weather(city, units="metric"):

11 key = os.environ.get("OPENWEATHER_KEY")

12 if not key:

13 sys.exit("Set OPENWEATHER_KEY first.")

14 url = f"{API}?q={city}&units={units}&appid={key}"

15 with urllib.request.urlopen(url, timeout=10) as r:

16 return json.load(r)

17

18

19def main(argv):

20 if len(argv) < 2:

21 print("usage: weather CITY [--units imperial]")

22 return 1

23 units = "imperial" if "--units" in argv else "metric"

24 data = fetch_weather(argv[1], units)

25 print(f"{argv[1]}: {data['main']['temp']}°")

26 return 0

27

28

29if __name__ == "__main__":

30 sys.exit(main(sys.argv))

weather.pyUnifiedSplitEdit

1 1 """Print the current temperature for a city."""

2 2 import json

3 3 import os

4 4 import sys

5 5 import urllib.request

6 6

7 7 API = "https://api.openweathermap.org/data/2.5/weather"

8 8

9 9

10 - def fetch_weather(city):

10 + def fetch_weather(city, units="metric"):

11 11 key = os.environ.get("OPENWEATHER_KEY")

12 12 if not key:

13 13 sys.exit("Set OPENWEATHER_KEY first.")

14 - url = f"{API}?q={city}&units=metric&appid={key}"

14 + url = f"{API}?q={city}&units={units}&appid={key}"

15 15 with urllib.request.urlopen(url, timeout=10) as r:

16 16 return json.load(r)

17 17

18 18

19 19 def main(argv):

20 20 if len(argv) < 2:

21 - print("usage: weather CITY")

21 + print("usage: weather CITY [--units imperial]")

22 22 return 1

23 - data = fetch_weather(argv[1])

23 + units = "imperial" if "--units" in argv else "metric"

24 + data = fetch_weather(argv[1], units)

24 25 print(f"{argv[1]}: {data['main']['temp']}°")

25 26 return 0

26 27

27 28

28 29 if __name__ == "__main__":

29 30 sys.exit(main(sys.argv))

mainLn 1, Col 1Spaces: 4LFPython

tests

.gitignore

cli.py

README.md

weather.py

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README.mdM

test_units.pytestsA

weather.pyM

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✎ weather.py

± weather.py

weather.pyUnifiedSplitEdit

8 8

9 9

10 - def fetch_weather(city):

10 + def fetch_weather(city, units="metric"):

11 11 key = os.environ.get("OPENWEATHER_KEY")

12 12 if not key:

13 13 sys.exit("Set OPENWEATHER_KEY first.")

14 - url = f"{API}?q={city}&units=metric&appid={key}"

14 + url = f"{API}?q={city}&units={units}&appid={key}"

15 15 with urllib.request.urlopen(url, timeout=10) as r:

16 16 return json.load(r)

17 17

18 18

19 19 def main(argv):

20 20 if len(argv) < 2:

21 - print("usage: weather CITY")

21 + print("usage: weather CITY [--units imperial]")

22 22 return 1

8

8

9

9

10 def fetch_weather(city):

10 def fetch_weather(city, units="metric"):

11 key = os.environ.get("OPENWEATHER_KEY")

11 key = os.environ.get("OPENWEATHER_KEY")

12 if not key:

12 if not key:

13 sys.exit("Set OPENWEATHER_KEY first.")

13 sys.exit("Set OPENWEATHER_KEY first.")

14 url = f"{API}?q={city}&units=metric&appid={key}"

14 url = f"{API}?q={city}&units={units}&appid={key}"

15 with urllib.request.urlopen(url, timeout=10) as r:

15 with urllib.request.urlopen(url, timeout=10) as r:

16 return json.load(r)

16 return json.load(r)

17

17

18

18

19 def main(argv):

19 def main(argv):

20 if len(argv) < 2:

20 if len(argv) < 2:

21 print("usage: weather CITY")

21 print("usage: weather CITY [--units imperial]")

22 return 1

22 return 1

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1# weather-cli

2

3Prints the **current temperature** for a city, from [OpenWeatherMap](https://openweathermap.org).

4

5## Usage

6

7```

8export OPENWEATHER_KEY=…

9python3 weather.py Paris --units imperial

10```

11

12| Option | What it does |

13|---|---|

14| `city` | the city to look up |

15| `--units` | `metric` or `imperial` |

16

17> Needs Python 3.9 or later.

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