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There are many fonts that can be set with jupyter-themes, so I have to be particular about fonts as well! I thought it was a trigger

Then please

Conclusion

--Fonts to avoid: --Jupyter default font: Not a monospaced font --saxMono: 1 and lowercase L are indistinguishable, 0 and uppercase O are indistinguishable --Liberation Mono: 0 and uppercase O are indistinguishable --Aurulent Sans Mono: 0 and uppercase O are indistinguishable -Other than "fonts to avoid", the rest is your choice. Meslo was selected because it is easy to distinguish between l and 1 + diagonal line 0 + slightly stronger than office.

Remarks

Code created so that you can change the theme while fluttering

import subprocess

font_raw = """anka	Anka/Coder
anonymous	Anonymous Pro
aurulent	Aurulent Sans Mono
bitstream	Bitstream Vera Sans Mono
bpmono	BPmono
code	Code New Roman
consolamono	Consolamono
cousine	Cousine
dejavu	DejaVu Sans Mono
droidmono	Droid Sans Mono
fira	Fira Mono
firacode	Fira Code
generic	Generic Mono
hack	Hack
hasklig	Hasklig
inconsolata	Inconsolata-g
inputmono	Input Mono
iosevka	Iosevka
liberation	Liberation Mono
meslo	Meslo
office	Office Code Pro
oxygen	Oxygen Mono
roboto	Roboto Mono
saxmono	saxMono
source	Source Code Pro
sourcemed	Source Code Pro Medium
ptmono	PT Mono
ubuntu	Ubuntu Mono"""

font_list = []
for i in font_raw.split('\n'):
    f_arg     = i.split('\t')[0]
    font_name = i.split('\t')[1]
    font_list.append((f_arg,font_name))

def generateCmd():
    base_cmd = 'jt -t gruvboxd -T -N -ofs 12 -f %(font_name)s'
    for font in font_list:
        print(font[1])
        yield base_cmd % {'font_name':font[0]}, font[1]

changeTheme= generateCmd()
cmd, font_name = next(changeTheme)
print(cmd)
res = subprocess.run(cmd,shell =True)

user_acc = { 'user': 'l1l1_aa_0O0O_2S2S', 'password': 'abcdefghijklmnopqrstuvwxyz0123456789', 'database': 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'}
print('font_name:'+font_name)
print('cmd:'+cmd)
for i in user_acc:
    print(i.ljust(15,' ')+user_acc[i])

Compare the fonts of jupyter-themes

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Conclusion

Remarks