f-string

问题 I recently trying to learn to code in python and I have zero knowledge in any programming languages our there and I encounter this problem in it, in which I am trying to use the f-string function. My Python version is 3.6.2 and here's the code that I am trying to run greeting = 'Hello' name = 'John' message = f'{greeting} {name}. Welcome!' print(message) and here's the error it shows me. File "/Users/RQ/Desktop/intro.py", line 16 message = f'{greeting} {name}. Welcome!' ^ SyntaxError: invalid

问题 This question comes from handling jupyter magics , but can be expressed in a more simple way. Given a string s = "the key is {d['key']}" and a dictionary d = {'key': 'val'} , we want to parse the string. The old method would be .format() , which will raise an error - it doesn't handle dictionary keys. "the key is {d['key']}".format(d=d) # ERROR I thought the only way around was to transform the dictionary to an object (explained here or here). "the key is {d.key}".format(obj(d)) But Martijn

问题 This question already has an answer here : Format a string that has extra curly braces in it (1 answer) Closed 12 months ago . In Python 3.6, there is the new f-string to include variables in strings which is great, but how do you correctly apply these strings to get super or subscripts printed for matplotlib? (to actually see the result with the subscript, you need to draw the variable foo on a matplotlib plot) In other words how do I get this behaviour: var = 123 foo = r'text$_{%s}$' % var

问题 This question already has an answer here : Format a string that has extra curly braces in it (1 answer) Closed 12 months ago . In Python 3.6, there is the new f-string to include variables in strings which is great, but how do you correctly apply these strings to get super or subscripts printed for matplotlib? (to actually see the result with the subscript, you need to draw the variable foo on a matplotlib plot) In other words how do I get this behaviour: var = 123 foo = r'text$_{%s}$' % var

问题 The usage of {} in Python f-strings is well known to execute pieces of code and give the result in string format (some tutorials here ). However, what does the ' = ' at the end of the expression mean? log_file = open("log_aug_19.txt", "w") console_error = '...stuff...' # the real code generates it with regex log_file.write(f'{console_error=}') 回答1: This is actually a brand-new feature as of Python 3.8. Added an = specifier to f-strings. An f-string such as f'{expr=}' will expand to the text

问题 The usage of {} in Python f-strings is well known to execute pieces of code and give the result in string format (some tutorials here ). However, what does the ' = ' at the end of the expression mean? log_file = open("log_aug_19.txt", "w") console_error = '...stuff...' # the real code generates it with regex log_file.write(f'{console_error=}') 回答1: This is actually a brand-new feature as of Python 3.8. Added an = specifier to f-strings. An f-string such as f'{expr=}' will expand to the text

来源： https://stackoverflow.com/questions/58667472/escaping-chars-in-f-string

来源： https://stackoverflow.com/questions/52850229/how-to-print-binary-numbers-using-f-string-instead-of-format

来源： https://stackoverflow.com/questions/49120113/dictionary-set-comprehensions-inside-of-f-string

来源： https://stackoverflow.com/questions/49120113/dictionary-set-comprehensions-inside-of-f-string