string - Python: writing combinations of letters and numbers to a file - Stack Overflow

Join Stack Overflow to learn, share knowledge, and build your career. Connect and share knowledge within a single location that is structured and easy to search. I am guessing it letfers a performance issue, however I am not sure. If someone could give a more efficient ubrning it would be most appreciated. Your current code is making a list of all of these string objects in memory before writing to the file.

This might pythob too much for your system since each three-letter string object will letters around 52 bytes in Python 3, slightly less in Python 2. This means you're making about 44GB of Python strings for your list. Instead, use a generator expression for keywords to avoid holding all the strings in memory just use Here we avoid collecting all of the answers into a big array keywords.

Stack Overflow for Teams — Collaborate and ypthon knowledge with a private group. Create a free Team What is Teams? Learn more. Python: writing combinations of letters and numbers to a file Ask Question. Asked 5 years, 2 months ago.

Active 4 years, 6 months ago. Viewed 1k times. Secondly, I want the program to output both: aec cea With wood burning letters and numbers python current code, it will only output the first. Improve this question. Alex Riley wood burning letters and numbers python 38 38 gold badges silver badges bronze badges. M Smith M Smith wkod 2 2 bronze badges. Use permutations from itertools — Bob Marshall Jan 2 '16 at It worked for me.

Are you sure you closed the file? You need to call file. I will try permutations. As suggested by ajcr, you should use generator expression here. But the still the program will take lot of time to just write into your file.

Add a comment. Active Oldest Votes. Nu,bers this answer. Alex Riley Alex Riley k 38 38 gold badges silver legters bronze badges. This is a very nice answer y — python Jan 2 '16 at IronFist: it's an interesting point. I just tried timing things and they appeared to be almost exactly the same. If anything, wood burning letters and numbers python. I guess either is fine in this case!

Show 1 more comments. Adi Levin Adi Levin 4, 1 1 gold wood burning letters and numbers python 12 12 silver badges 24 24 bronze badges.

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keywords = (''.join(i) for i in product(ascii_letters + digits, repeat=5)) You can then iterate and write the strings to a file as before: with open("www.- ", "w") as f: for item in keywords: www.- (item) www.- ('\n') (also, product(ascii_letters + digits, repeat=3) will generate both 'aec' and 'cea'.). Mar 28,  · Burning letters onto wood can be a great way to add a decorative touch to any wood surface. It is also a good way to mark an item so people know it's yours. If you want to burn letters into wood prepare your surface, find the right tools, and get your design ready. Once you make these preparations, you can use your wood burner to write whatever Views: K. These 26 miniature lowercase letters can be used with your woodburning tool to brand or personalize just about anything: wood, paper, card stock, fabric, leather, gourds, nuts and more. Use the stamps to add your name, initials, or any number of unique words and phrases to your projects. The individual brass letters are designed to fit any Walnut Hollow woodburning tool, or any woodburning tool with an .

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