General
PromptBeginner5 minmarkdown
→ df.dropna(subset=[TARGET_COL]
inplace=True)
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General
PromptBeginner5 minmarkdown
│ │ Signs: Missingness correlates with OTHER columns
│
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General
PromptBeginner5 minmarkdown
For **each column** with missing values
evaluate all three branches simultaneously:
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General
PromptBeginner5 minmarkdown
**For each flagged column
fill in this analysis card:**
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General
PromptBeginner5 minmarkdown
missing_report = missing_report.sort_values('Missing_%'
ascending=False)
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General
PromptBeginner5 minmarkdown
df.replace(DISGUISED_NULLS
np.nan
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General
PromptBeginner5 minmarkdown
DISGUISED_NULLS = [?
N/A
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General
PromptBeginner5 minmarkdown
- e.g.
CustomerID must be unique and non-null
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General
PromptBeginner5 minmarkdown
- e.g.
Age cannot be 0 or negative
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General
PromptBeginner5 minmarkdown
- e.g.
Price is the target — rows missing it are unusable
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General
PromptBeginner5 minmarkdown
- Watch for: ?
N/A
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General
PromptBeginner5 minmarkdown
MODEL_TYPE = [e.g.
XGBoost / LinearRegression / Neural Network]
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General
PromptBeginner5 minmarkdown
- Boolean → binary flags (0/1
True/False)
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General
PromptBeginner5 minmarkdown
TARGET_COL = [e.g.
price]
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Coding & Debugging
PromptBeginner5 minmarkdown
You are a **Senior Data Scientist and ML Pipeline Engineer** specializing in data quality
feature engineering
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General
PromptBeginner5 minmarkdown
| `PROMPT()` | This master template — governs all reasoning
rules
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General
PromptBeginner5 minmarkdown
MISSING VALUES HANDLER
# PROMPT() — UNIVERSAL MISSING VALUES HANDLER
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Coding & Debugging
PromptBeginner5 minmarkdown
Provide structured updates to `PROGRESS.md` to keep the context usage under 40%. Do not make direct code changes to other files; focus exclusively on keeping the project's memory clean
accurate
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General
PromptBeginner5 minmarkdown
- **Modular References**: Linking to secondary markdowns (like PRDs
sprint_todo.md
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General
PromptBeginner5 minmarkdown
- **Architectural Constraints**: Ensuring that strict structural rules
DevSecOps guidelines
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General
PromptBeginner5 minmarkdown
- **State Tracking**: Accurately updating the Progress/Status section with `[x] Done`
`[ ] Current`
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General
PromptBeginner5 minmarkdown
description: Creates
updates
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General
PromptBeginner5 minmarkdown
A brief
jargon-free explanation of what the concept is.
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General
PromptBeginner5 minmarkdown
4. **One at a Time:** If the user asks for multiple concepts
ask which one to do first.
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