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% Document Info
\author{eazykaye}
\pdfinfo{
  /Title (python3-f-strings.pdf)
  /Creator (Cheatography)
  /Author (eazykaye)
  /Subject (Python3 F-Strings Cheat Sheet)
}

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\noindent
\begin{multicols}{3}
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    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
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    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Python3 F-Strings Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{eazykaye} via \textcolor{DarkBackground}{\uline{cheatography.com/164268/cs/34422/}}}
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\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}eazykaye \\
  \uline{cheatography.com/eazykaye} \\
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  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 30th September, 2022.\\
   Updated 28th October, 2023.\\
   Page {\thepage} of \pageref{LastPage}.
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  Measure your website readability!\\
  www.readability-score.com
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\begin{document}
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\footnotesize % Small font.

\begin{multicols*}{3}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Number Formatting}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{number = 210 \newline  \newline \# decimal places \newline print(f"number: \{number:.2f\}") \newline  \newline \# hex conversion \newline print(f"hex: \{number:\#0x\}") \newline  \newline \# binary conversion \newline print(f"binary: \{number:b\}") \newline  \newline \# octal conversion \newline print(f"octal: \{number:o\}") \newline  \newline \# scientific notation \newline print(f"scientific: \{number:e\}")  \newline  \newline \# total number of characters \newline print(f"Number: \{number:09\}")  \newline  \newline \# use comma separator \newline apple\_marketcap = 2.626 * 10e12 \newline print(f"\{apple\_marketcap = :,\}") \# comma separator \newline  \newline \#set 2 decimal places and add a percentage sign to the end \newline percentage = 10.39439423 \newline print(f"\{percentage = :.2\%\}") \# percentage \newline  \newline \#set 4 decimal places \newline number= 10.39439423 \newline print(f"\{number:.4f\}") \newline  \newline \#Output: \newline number: 420.00 \newline hex: 0x1a4 \newline binary: 110100100 \newline octal: 644 \newline scientific: 4.200000e+02 \newline Number: 000000420 \newline apple\_marketcap = 26,260,000,000,000.0 \newline percentage = 1039.44\% \newline 10.3944} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Repr \& Str}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\# \_\_repr\_\_= developer friendly \newline \# \_\_str\_\_ = user friendly \newline \# write !r to tell Python to print out the repr method instead. \newline  \newline from dataclasses import dataclass \newline  \newline @dataclass \newline class Person: \newline     name : str \newline     age : int \newline  \newline     def \_\_str\_\_(self) -\textgreater{} str: \newline         return f"\{self.name\} is \{self.age\} years old" \newline  \newline Elon = Person("Elon Musk", 51) \newline print(f"\{Elon\}") \# str \newline print(f"\{Elon!r\}") \# repr \newline  \newline \#output: \newline Elon Musk is 51 years old \newline Person(name='Elon Musk', age=51)} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
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\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Date formatting}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{import datetime \newline  \newline today = \seqsplit{datetime.datetime.utcnow()} \newline print(f"datetime : \{today\}\textbackslash{}n") \newline  \newline \# no microseconds \newline print(f"date time: \{today:\%m/\%d/\%Y \%H:\%M:\%S\}") \newline  \newline \# date only \newline print(f"date: \{today:\%m/\%d/\%Y\}") \newline  \newline \# time only \newline print(f"time: \{today:\%H:\%M:\%S.\%f\}")  \newline  \newline \# time with AM/PM \newline print(f"time: \{today:\%H:\%M:\%S \%p\}")  \newline  \newline \# 24-hour format \newline print(f"time: \{today:\%H:\%M\}") \newline  \newline \# Locale's appropriate date and time representation \newline print(f"locale appropriate: \{today:\%c\}") \newline  \newline \# weekday \newline print(f"weekday: \{today:\%A\}") \newline  \newline \# day of the year \newline print(f"day of year: \{today:\%j\}") \newline  \newline \# how far are we into the year? \newline day\_of\_year = f"\{today:\%j\}" \newline print(f"progress \% year: \{int(day\_of\_year)/365 * 100:.2f\}\%") \newline  \newline \#output \newline datetime : 2022-09-13 05:44:17.546036 \newline  \newline date time: 09/13/2022 05:44:17 \newline date: 09/13/2022 \newline time: 05:44:17.546036 \newline time: 05:44:17 AM \newline time: 05:44 \newline locale appropriate: Tue Sep 13 05:44:17 2022 \newline weekday: Tuesday \newline day of year: 256 \newline progress \% year: 70.14\%} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{strftime Format Codes: \seqsplit{https://docs.python.org/3/library/datetime.html\#strftime-and-strptime-format-codes}}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
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\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Debugging}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\# works in Python 3.8+ \newline  \newline x = 10 \newline y = 20 \newline  \newline print(f"x = \{x\}, y = \{y\}")  \newline print(f"\{x = \}, \{y = \}")  \newline  \newline \# math operations \newline print(f"\{x {\emph{ y = \}") \newline  \newline \#output: \newline x = 10, y = 20 \newline x = 10, y = 20 \newline x }} y = 200} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
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\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Multi-line f-string}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{company\_name = "Tesla" \newline employee\_count = 100000 \newline mission = "To accelerate the world's transition to sustainable energy" \newline  \newline print(f""" \newline Company: \{company\_name\} \newline \# of employees: \{employee\_count:,\} \newline Mission: \{mission\} \newline """) \newline  \newline \#output: \newline Company: Tesla \newline \# of employees: 100,000 \newline Mission: To accelerate the world's transition to sustainable energy} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
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\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Alignment}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{number = 4 \newline  \newline \# n stands for the width of space to print the variable number starting from the string "is" (inclusive of the variable itself) \newline print(f"number is \{number:4\}") \newline \#number is    4 \newline  \newline for number in range(1, 5): \newline     print(f"the number is \{number:\{number\}\}") \newline  \newline \# the number is 1 \newline \# the number is  2 \newline \# the number is   3 \newline \# the number is    4 \newline  \newline left = "left text" \newline center = "center text!" \newline right = "right text" \newline  \newline \# left:\textgreater{}20 means given a width of 20 characters print out the string "left text" starting from the left. \newline print(f"\{left:\textgreater{}20\}") \# left align \newline \#           left text \newline  \newline \# center:\textasciicircum{}20 that means to leave whatever space is left on the left and right. Since the string "center text!" is 12 characters, the left and right would have four characters of white space. \newline print(f"\{center:\textasciicircum{}20\}") \# center align \newline \#    center text! \newline  \newline print(f"\{right:\textless{}20\}") \# right align \newline \#right text \newline  \newline \# If we put all three strings together with their formatting options, we would have a width of 60 to place the left, center, and right string variables. \newline print(f"\{left : \textless{}20\}\{center : \textasciicircum{}20\}\{right : \textgreater{}20\}") \newline \#left text               center text!              right text} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
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\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}